[Net] Add a priority parameter to URLRequest's constructor

This is so that it is clearer what the intended initial priority of
a URLRequest is.

It is also needed so that we can later enforce that if a URLRequest
is set to ignore limits, it has MAXIMUM_PRIORITY; otherwise, we'd have
to mandate that SetPriority() is called before set_load_flags(), which
is fiddly.

Also standardize on a single URLRequest constructor.

BUG=166689
R=jam@chromium.org, jamesr@chromium.org, joth@chromium.org, mmenke@chromium.org, scottbyer@chromium.org, sky@chromium.org, tommi@chromium.org

Review URL: https://codereview.chromium.org/51953002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@232219 0039d316-1c4b-4281-b951-d872f2087c98

65 files changed, 1059 insertions, 690 deletions

diff --git a/android_webview/browser/net/android_stream_reader_url_request_job_unittest.cc b/android_webview/browser/net/android_stream_reader_url_request_job_unittest.cc
index 97a310ce..6954aa9 100644
--- a/android_webview/browser/net/android_stream_reader_url_request_job_unittest.cc
+++ b/android_webview/browser/net/android_stream_reader_url_request_job_unittest.cc
@@ -10,6 +10,7 @@
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/stringprintf.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request_job_factory_impl.h"
 #include "net/url_request/url_request_test_util.h"
 
@@ -151,11 +152,10 @@ class AndroidStreamReaderURLRequestJobTest : public Test {
   virtual void SetUp() {
     context_.set_job_factory(&factory_);
     context_.set_network_delegate(&network_delegate_);
-    req_.reset(
-        new TestURLRequest(GURL("content://foo"),
-                           &url_request_delegate_,
-                           &context_,
-                           &network_delegate_));
+    req_.reset(new TestURLRequest(GURL("content://foo"),
+                                  net::DEFAULT_PRIORITY,
+                                  &url_request_delegate_,
+                                  &context_));
     req_->set_method("GET");
   }
 
diff --git a/chrome/browser/chromeos/drive/drive_url_request_job_unittest.cc b/chrome/browser/chromeos/drive/drive_url_request_job_unittest.cc
index c96ced0..fa02bc46 100644
--- a/chrome/browser/chromeos/drive/drive_url_request_job_unittest.cc
+++ b/chrome/browser/chromeos/drive/drive_url_request_job_unittest.cc
@@ -20,6 +20,7 @@
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/test/test_browser_thread_bundle.h"
+#include "net/base/request_priority.h"
 #include "net/base/test_completion_callback.h"
 #include "net/http/http_byte_range.h"
 #include "net/url_request/url_request_test_util.h"
@@ -183,9 +184,10 @@ class DriveURLRequestJobTest : public testing::Test {
 };
 
 TEST_F(DriveURLRequestJobTest, NonGetMethod) {
-  net::URLRequest request(
-      GURL("drive:drive/root/File 1.txt"), test_delegate_.get(),
-      url_request_context_.get(), test_network_delegate_.get());
+  net::URLRequest request(GURL("drive:drive/root/File 1.txt"),
+                          net::DEFAULT_PRIORITY,
+                          test_delegate_.get(),
+                          url_request_context_.get());
   request.set_method("POST");  // Set non "GET" method.
   request.Start();
 
@@ -201,9 +203,10 @@ TEST_F(DriveURLRequestJobTest, RegularFile) {
 
   // For the first time, the file should be fetched from the server.
   {
-    net::URLRequest request(
-        kTestUrl, test_delegate_.get(),
-        url_request_context_.get(), test_network_delegate_.get());
+    net::URLRequest request(kTestUrl,
+                            net::DEFAULT_PRIORITY,
+                            test_delegate_.get(),
+                            url_request_context_.get());
     request.Start();
 
     base::RunLoop().Run();
@@ -226,9 +229,10 @@ TEST_F(DriveURLRequestJobTest, RegularFile) {
   // The caching emulation is done by FakeFileSystem.
   {
     test_delegate_.reset(new TestDelegate);
-    net::URLRequest request(
-        GURL("drive:drive/root/File 1.txt"), test_delegate_.get(),
-        url_request_context_.get(), test_network_delegate_.get());
+    net::URLRequest request(GURL("drive:drive/root/File 1.txt"),
+                            net::DEFAULT_PRIORITY,
+                            test_delegate_.get(),
+                            url_request_context_.get());
     request.Start();
 
     base::RunLoop().Run();
@@ -249,8 +253,9 @@ TEST_F(DriveURLRequestJobTest, HostedDocument) {
   test_delegate_->set_quit_on_redirect(true);
   net::URLRequest request(
       GURL("drive:drive/root/Document 1 excludeDir-test.gdoc"),
+      net::DEFAULT_PRIORITY,
       test_delegate_.get(),
-      url_request_context_.get(), test_network_delegate_.get());
+      url_request_context_.get());
   request.Start();
 
   base::RunLoop().Run();
@@ -263,9 +268,10 @@ TEST_F(DriveURLRequestJobTest, HostedDocument) {
 }
 
 TEST_F(DriveURLRequestJobTest, RootDirectory) {
-  net::URLRequest request(
-      GURL("drive:drive/root"), test_delegate_.get(),
-      url_request_context_.get(), test_network_delegate_.get());
+  net::URLRequest request(GURL("drive:drive/root"),
+                          net::DEFAULT_PRIORITY,
+                          test_delegate_.get(),
+                          url_request_context_.get());
   request.Start();
 
   base::RunLoop().Run();
@@ -275,9 +281,10 @@ TEST_F(DriveURLRequestJobTest, RootDirectory) {
 }
 
 TEST_F(DriveURLRequestJobTest, Directory) {
-  net::URLRequest request(
-      GURL("drive:drive/root/Directory 1"), test_delegate_.get(),
-      url_request_context_.get(), test_network_delegate_.get());
+  net::URLRequest request(GURL("drive:drive/root/Directory 1"),
+                          net::DEFAULT_PRIORITY,
+                          test_delegate_.get(),
+                          url_request_context_.get());
   request.Start();
 
   base::RunLoop().Run();
@@ -287,9 +294,10 @@ TEST_F(DriveURLRequestJobTest, Directory) {
 }
 
 TEST_F(DriveURLRequestJobTest, NonExistingFile) {
-  net::URLRequest request(
-      GURL("drive:drive/root/non-existing-file.txt"), test_delegate_.get(),
-      url_request_context_.get(), test_network_delegate_.get());
+  net::URLRequest request(GURL("drive:drive/root/non-existing-file.txt"),
+                          net::DEFAULT_PRIORITY,
+                          test_delegate_.get(),
+                          url_request_context_.get());
   request.Start();
 
   base::RunLoop().Run();
@@ -299,9 +307,10 @@ TEST_F(DriveURLRequestJobTest, NonExistingFile) {
 }
 
 TEST_F(DriveURLRequestJobTest, WrongFormat) {
-  net::URLRequest request(
-      GURL("drive:"), test_delegate_.get(),
-      url_request_context_.get(), test_network_delegate_.get());
+  net::URLRequest request(GURL("drive:"),
+                          net::DEFAULT_PRIORITY,
+                          test_delegate_.get(),
+                          url_request_context_.get());
   request.Start();
 
   base::RunLoop().Run();
@@ -311,9 +320,10 @@ TEST_F(DriveURLRequestJobTest, WrongFormat) {
 }
 
 TEST_F(DriveURLRequestJobTest, Cancel) {
-  net::URLRequest request(
-      GURL("drive:drive/root/File 1.txt"), test_delegate_.get(),
-      url_request_context_.get(), test_network_delegate_.get());
+  net::URLRequest request(GURL("drive:drive/root/File 1.txt"),
+                          net::DEFAULT_PRIORITY,
+                          test_delegate_.get(),
+                          url_request_context_.get());
 
   // Start the request, and cancel it immediately after it.
   request.Start();
@@ -328,9 +338,10 @@ TEST_F(DriveURLRequestJobTest, RangeHeader) {
   const GURL kTestUrl("drive:drive/root/File 1.txt");
   const base::FilePath kTestFilePath("drive/root/File 1.txt");
 
-  net::URLRequest request(
-      kTestUrl, test_delegate_.get(),
-      url_request_context_.get(), test_network_delegate_.get());
+  net::URLRequest request(kTestUrl,
+                          net::DEFAULT_PRIORITY,
+                          test_delegate_.get(),
+                          url_request_context_.get());
 
   // Set range header.
   request.SetExtraRequestHeaderByName(
@@ -351,9 +362,10 @@ TEST_F(DriveURLRequestJobTest, RangeHeader) {
 TEST_F(DriveURLRequestJobTest, WrongRangeHeader) {
   const GURL kTestUrl("drive:drive/root/File 1.txt");
 
-  net::URLRequest request(
-      kTestUrl, test_delegate_.get(),
-      url_request_context_.get(), test_network_delegate_.get());
+  net::URLRequest request(kTestUrl,
+                          net::DEFAULT_PRIORITY,
+                          test_delegate_.get(),
+                          url_request_context_.get());
 
   // Set range header.
   request.SetExtraRequestHeaderByName(
diff --git a/chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc b/chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc
index 75b24ac..468d634 100644
--- a/chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc
+++ b/chrome/browser/custom_handlers/protocol_handler_registry_unittest.cc
@@ -21,6 +21,7 @@
 #include "content/public/browser/notification_source.h"
 #include "content/public/test/test_browser_thread.h"
 #include "content/public/test/test_renderer_host.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -34,11 +35,10 @@ void AssertInterceptedIO(
     net::URLRequestJobFactory* interceptor) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
   net::URLRequestContext context;
-  net::NetworkDelegate *network_delegate = NULL;
-  net::URLRequest request(url, NULL, &context);
+  net::URLRequest request(url, net::DEFAULT_PRIORITY, NULL, &context);
   scoped_refptr<net::URLRequestJob> job =
       interceptor->MaybeCreateJobWithProtocolHandler(
-          url.scheme(), &request, network_delegate);
+          url.scheme(), &request, context.network_delegate());
   ASSERT_TRUE(job.get() != NULL);
 }
 
diff --git a/chrome/browser/extensions/api/declarative_webrequest/webrequest_action_unittest.cc b/chrome/browser/extensions/api/declarative_webrequest/webrequest_action_unittest.cc
index 0c4925fd..d54053b 100644
--- a/chrome/browser/extensions/api/declarative_webrequest/webrequest_action_unittest.cc
+++ b/chrome/browser/extensions/api/declarative_webrequest/webrequest_action_unittest.cc
@@ -23,6 +23,7 @@
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/extensions/extension_test_util.h"
 #include "content/public/test/test_browser_thread_bundle.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ -135,7 +136,8 @@ bool WebRequestActionWithThreadsTest::ActionWorksOnRequest(
     const std::string& extension_id,
     const WebRequestActionSet* action_set,
     RequestStage stage) {
-  net::TestURLRequest regular_request(GURL(url_string), NULL, &context_, NULL);
+  net::TestURLRequest regular_request(
+      GURL(url_string), net::DEFAULT_PRIORITY, NULL, &context_);
   std::list<LinkedPtrEventResponseDelta> deltas;
   scoped_refptr<net::HttpResponseHeaders> headers(
       new net::HttpResponseHeaders(""));
diff --git a/chrome/browser/extensions/api/declarative_webrequest/webrequest_condition_attribute_unittest.cc b/chrome/browser/extensions/api/declarative_webrequest/webrequest_condition_attribute_unittest.cc
index 76c9cad..a15d034 100644
--- a/chrome/browser/extensions/api/declarative_webrequest/webrequest_condition_attribute_unittest.cc
+++ b/chrome/browser/extensions/api/declarative_webrequest/webrequest_condition_attribute_unittest.cc
@@ -11,6 +11,7 @@
 #include "chrome/browser/extensions/api/declarative_webrequest/webrequest_condition.h"
 #include "chrome/browser/extensions/api/declarative_webrequest/webrequest_constants.h"
 #include "content/public/browser/resource_request_info.h"
+#include "net/base/request_priority.h"
 #include "net/test/spawned_test_server/spawned_test_server.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -89,14 +90,14 @@ TEST(WebRequestConditionAttributeTest, ResourceType) {
 
   net::TestURLRequestContext context;
   net::TestURLRequest url_request_ok(
-      GURL("http://www.example.com"), NULL, &context, NULL);
+      GURL("http://www.example.com"), net::DEFAULT_PRIORITY, NULL, &context);
   content::ResourceRequestInfo::AllocateForTesting(
       &url_request_ok, ResourceType::SUB_FRAME, NULL, -1, -1, false);
   EXPECT_TRUE(attribute->IsFulfilled(WebRequestData(&url_request_ok,
                                                     ON_BEFORE_REQUEST)));
 
   net::TestURLRequest url_request_fail(
-      GURL("http://www.example.com"), NULL, &context, NULL);
+      GURL("http://www.example.com"), net::DEFAULT_PRIORITY, NULL, &context);
   content::ResourceRequestInfo::AllocateForTesting(
       &url_request_fail, ResourceType::MAIN_FRAME, NULL, -1, -1, false);
   EXPECT_FALSE(attribute->IsFulfilled(WebRequestData(&url_request_fail,
@@ -119,8 +120,10 @@ TEST(WebRequestConditionAttributeTest, ContentType) {
 
   net::TestURLRequestContext context;
   net::TestDelegate delegate;
-  net::TestURLRequest url_request(
-      test_server.GetURL("files/headers.html"), &delegate, &context, NULL);
+  net::TestURLRequest url_request(test_server.GetURL("files/headers.html"),
+                                  net::DEFAULT_PRIORITY,
+                                  &delegate,
+                                  &context);
   url_request.Start();
   base::MessageLoop::current()->Run();
 
@@ -203,7 +206,8 @@ TEST(WebRequestConditionAttributeTest, ThirdParty) {
   const GURL url_b("http://b.com");
   net::TestURLRequestContext context;
   net::TestDelegate delegate;
-  net::TestURLRequest url_request(url_a, &delegate, &context, NULL);
+  net::TestURLRequest url_request(
+      url_a, net::DEFAULT_PRIORITY, &delegate, &context);
 
   for (unsigned int i = 1; i <= kLastActiveStage; i <<= 1) {
     if (!(kActiveStages & i))
@@ -293,7 +297,8 @@ TEST(WebRequestConditionAttributeTest, Stages) {
   const GURL url_empty;
   net::TestURLRequestContext context;
   net::TestDelegate delegate;
-  net::TestURLRequest url_request(url_empty, &delegate, &context, NULL);
+  net::TestURLRequest url_request(
+      url_empty, net::DEFAULT_PRIORITY, &delegate, &context);
 
   for (size_t i = 0; i < arraysize(active_stages); ++i) {
     EXPECT_FALSE(empty_attribute->IsFulfilled(
@@ -417,7 +422,9 @@ TEST(WebRequestConditionAttributeTest, RequestHeaders) {
   net::TestURLRequestContext context;
   net::TestDelegate delegate;
   net::TestURLRequest url_request(GURL("http://example.com"),  // Dummy URL.
-                                  &delegate, &context, NULL);
+                                  net::DEFAULT_PRIORITY,
+                                  &delegate,
+                                  &context);
   url_request.SetExtraRequestHeaderByName(
       "Custom-header", "custom/value", true /* overwrite */);
   url_request.Start();
@@ -502,7 +509,9 @@ TEST(WebRequestConditionAttributeTest, ResponseHeaders) {
   net::TestURLRequestContext context;
   net::TestDelegate delegate;
   net::TestURLRequest url_request(test_server.GetURL("files/headers.html"),
-                                  &delegate, &context, NULL);
+                                  net::DEFAULT_PRIORITY,
+                                  &delegate,
+                                  &context);
   url_request.Start();
   base::MessageLoop::current()->Run();
 
diff --git a/chrome/browser/extensions/api/declarative_webrequest/webrequest_condition_unittest.cc b/chrome/browser/extensions/api/declarative_webrequest/webrequest_condition_unittest.cc
index d30d1a6..38552ad 100644
--- a/chrome/browser/extensions/api/declarative_webrequest/webrequest_condition_unittest.cc
+++ b/chrome/browser/extensions/api/declarative_webrequest/webrequest_condition_unittest.cc
@@ -12,6 +12,7 @@
 #include "chrome/browser/extensions/api/declarative_webrequest/webrequest_constants.h"
 #include "content/public/browser/resource_request_info.h"
 #include "extensions/common/matcher/url_matcher_constants.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -76,7 +77,8 @@ TEST(WebRequestConditionTest, CreateCondition) {
 
   net::TestURLRequestContext context;
   const GURL http_url("http://www.example.com");
-  net::TestURLRequest match_request(http_url, NULL, &context, NULL);
+  net::TestURLRequest match_request(
+      http_url, net::DEFAULT_PRIORITY, NULL, &context);
   WebRequestData data(&match_request, ON_BEFORE_REQUEST);
   WebRequestDataWithMatchIds request_data(&data);
   request_data.url_match_ids = matcher.MatchURL(http_url);
@@ -86,7 +88,8 @@ TEST(WebRequestConditionTest, CreateCondition) {
   EXPECT_TRUE(result->IsFulfilled(request_data));
 
   const GURL https_url("https://www.example.com");
-  net::TestURLRequest wrong_resource_type(https_url, NULL, &context, NULL);
+  net::TestURLRequest wrong_resource_type(
+      https_url, net::DEFAULT_PRIORITY, NULL, &context);
   data.request = &wrong_resource_type;
   request_data.url_match_ids = matcher.MatchURL(http_url);
   // Make sure IsFulfilled does not fail because of URL matching.
@@ -123,7 +126,8 @@ TEST(WebRequestConditionTest, CreateConditionFirstPartyForCookies) {
   net::TestURLRequestContext context;
   const GURL http_url("http://www.example.com");
   const GURL first_party_url("http://fpfc.example.com");
-  net::TestURLRequest match_request(http_url, NULL, &context, NULL);
+  net::TestURLRequest match_request(
+      http_url, net::DEFAULT_PRIORITY, NULL, &context);
   WebRequestData data(&match_request, ON_BEFORE_REQUEST);
   WebRequestDataWithMatchIds request_data(&data);
   request_data.url_match_ids = matcher.MatchURL(http_url);
@@ -196,7 +200,7 @@ TEST(WebRequestConditionTest, NoUrlAttributes) {
 
   net::TestURLRequestContext context;
   net::TestURLRequest https_request(
-      GURL("https://www.example.com"), NULL, &context, NULL);
+      GURL("https://www.example.com"), net::DEFAULT_PRIORITY, NULL, &context);
 
   // 1. A non-empty condition without UrlFilter attributes is fulfilled iff its
   //    attributes are fulfilled.
@@ -255,7 +259,8 @@ TEST(WebRequestConditionTest, CreateConditionSet) {
   // https://www.example.com
   GURL http_url("http://www.example.com");
   net::TestURLRequestContext context;
-  net::TestURLRequest http_request(http_url, NULL, &context, NULL);
+  net::TestURLRequest http_request(
+      http_url, net::DEFAULT_PRIORITY, NULL, &context);
   WebRequestData data(&http_request, ON_BEFORE_REQUEST);
   WebRequestDataWithMatchIds request_data(&data);
   request_data.url_match_ids = matcher.MatchURL(http_url);
@@ -266,7 +271,8 @@ TEST(WebRequestConditionTest, CreateConditionSet) {
   GURL https_url("https://www.example.com");
   request_data.url_match_ids = matcher.MatchURL(https_url);
   EXPECT_EQ(1u, request_data.url_match_ids.size());
-  net::TestURLRequest https_request(https_url, NULL, &context, NULL);
+  net::TestURLRequest https_request(
+      https_url, net::DEFAULT_PRIORITY, NULL, &context);
   data.request = &https_request;
   EXPECT_TRUE(result->IsFulfilled(*(request_data.url_match_ids.begin()),
                                   request_data));
@@ -275,7 +281,8 @@ TEST(WebRequestConditionTest, CreateConditionSet) {
   GURL https_foo_url("https://foo.example.com");
   request_data.url_match_ids = matcher.MatchURL(https_foo_url);
   EXPECT_EQ(0u, request_data.url_match_ids.size());
-  net::TestURLRequest https_foo_request(https_foo_url, NULL, &context, NULL);
+  net::TestURLRequest https_foo_request(
+      https_foo_url, net::DEFAULT_PRIORITY, NULL, &context);
   data.request = &https_foo_request;
   EXPECT_FALSE(result->IsFulfilled(-1, request_data));
 }
@@ -313,22 +320,26 @@ TEST(WebRequestConditionTest, TestPortFilter) {
   // Test various URLs.
   GURL http_url("http://www.example.com");
   net::TestURLRequestContext context;
-  net::TestURLRequest http_request(http_url, NULL, &context, NULL);
+  net::TestURLRequest http_request(
+      http_url, net::DEFAULT_PRIORITY, NULL, &context);
   url_match_ids = matcher.MatchURL(http_url);
   ASSERT_EQ(1u, url_match_ids.size());
 
   GURL http_url_80("http://www.example.com:80");
-  net::TestURLRequest http_request_80(http_url_80, NULL, &context, NULL);
+  net::TestURLRequest http_request_80(
+      http_url_80, net::DEFAULT_PRIORITY, NULL, &context);
   url_match_ids = matcher.MatchURL(http_url_80);
   ASSERT_EQ(1u, url_match_ids.size());
 
   GURL http_url_1000("http://www.example.com:1000");
-  net::TestURLRequest http_request_1000(http_url_1000, NULL, &context, NULL);
+  net::TestURLRequest http_request_1000(
+      http_url_1000, net::DEFAULT_PRIORITY, NULL, &context);
   url_match_ids = matcher.MatchURL(http_url_1000);
   ASSERT_EQ(1u, url_match_ids.size());
 
   GURL http_url_2000("http://www.example.com:2000");
-  net::TestURLRequest http_request_2000(http_url_2000, NULL, &context, NULL);
+  net::TestURLRequest http_request_2000(
+      http_url_2000, net::DEFAULT_PRIORITY, NULL, &context);
   url_match_ids = matcher.MatchURL(http_url_2000);
   ASSERT_EQ(0u, url_match_ids.size());
 }
diff --git a/chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry_unittest.cc b/chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry_unittest.cc
index 29f7791..a7997f4 100644
--- a/chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry_unittest.cc
+++ b/chrome/browser/extensions/api/declarative_webrequest/webrequest_rules_registry_unittest.cc
@@ -19,6 +19,7 @@
 #include "chrome/common/extensions/extension_test_util.h"
 #include "content/public/test/test_browser_thread.h"
 #include "extensions/common/matcher/url_matcher_constants.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest-message.h"
@@ -277,7 +278,8 @@ TEST_F(WebRequestRulesRegistryTest, AddRulesImpl) {
 
   GURL http_url("http://www.example.com");
   net::TestURLRequestContext context;
-  net::TestURLRequest http_request(http_url, NULL, &context, NULL);
+  net::TestURLRequest http_request(
+      http_url, net::DEFAULT_PRIORITY, NULL, &context);
   WebRequestData request_data(&http_request, ON_BEFORE_REQUEST);
   matches = registry->GetMatches(request_data);
   EXPECT_EQ(2u, matches.size());
@@ -290,7 +292,8 @@ TEST_F(WebRequestRulesRegistryTest, AddRulesImpl) {
   EXPECT_TRUE(ContainsKey(matches_ids, std::make_pair(kExtensionId, kRuleId2)));
 
   GURL foobar_url("http://www.foobar.com");
-  net::TestURLRequest foobar_request(foobar_url, NULL, &context, NULL);
+  net::TestURLRequest foobar_request(
+      foobar_url, net::DEFAULT_PRIORITY, NULL, &context);
   request_data.request = &foobar_request;
   matches = registry->GetMatches(request_data);
   EXPECT_EQ(1u, matches.size());
@@ -416,7 +419,7 @@ TEST_F(WebRequestRulesRegistryTest, Precedences) {
 
   GURL url("http://www.google.com");
   net::TestURLRequestContext context;
-  net::TestURLRequest request(url, NULL, &context, NULL);
+  net::TestURLRequest request(url, net::DEFAULT_PRIORITY, NULL, &context);
   WebRequestData request_data(&request, ON_BEFORE_REQUEST);
   std::list<LinkedPtrEventResponseDelta> deltas =
       registry->CreateDeltas(NULL, request_data, false);
@@ -464,7 +467,7 @@ TEST_F(WebRequestRulesRegistryTest, Priorities) {
 
   GURL url("http://www.google.com/index.html");
   net::TestURLRequestContext context;
-  net::TestURLRequest request(url, NULL, &context, NULL);
+  net::TestURLRequest request(url, net::DEFAULT_PRIORITY, NULL, &context);
   WebRequestData request_data(&request, ON_BEFORE_REQUEST);
   std::list<LinkedPtrEventResponseDelta> deltas =
       registry->CreateDeltas(NULL, request_data, false);
@@ -537,7 +540,7 @@ TEST_F(WebRequestRulesRegistryTest, IgnoreRulesByTag) {
 
   GURL url("http://www.foo.com/test");
   net::TestURLRequestContext context;
-  net::TestURLRequest request(url, NULL, &context, NULL);
+  net::TestURLRequest request(url, net::DEFAULT_PRIORITY, NULL, &context);
   WebRequestData request_data(&request, ON_BEFORE_REQUEST);
   std::list<LinkedPtrEventResponseDelta> deltas =
       registry->CreateDeltas(NULL, request_data, false);
@@ -586,7 +589,8 @@ TEST_F(WebRequestRulesRegistryTest, GetMatchesCheckFulfilled) {
 
   GURL http_url("http://www.example.com");
   net::TestURLRequestContext context;
-  net::TestURLRequest http_request(http_url, NULL, &context, NULL);
+  net::TestURLRequest http_request(
+      http_url, net::DEFAULT_PRIORITY, NULL, &context);
   WebRequestData request_data(&http_request, ON_BEFORE_REQUEST);
   matches = registry->GetMatches(request_data);
   EXPECT_EQ(1u, matches.size());
@@ -642,7 +646,8 @@ TEST_F(WebRequestRulesRegistryTest, GetMatchesDifferentUrls) {
 
   for (size_t i = 0; i < arraysize(matchingRuleIds); ++i) {
     // Construct the inputs.
-    net::TestURLRequest http_request(urls[i], NULL, &context, NULL);
+    net::TestURLRequest http_request(
+        urls[i], net::DEFAULT_PRIORITY, NULL, &context);
     WebRequestData request_data(&http_request, ON_BEFORE_REQUEST);
     http_request.set_first_party_for_cookies(firstPartyUrls[i]);
     // Now run both rules on the input.
@@ -788,14 +793,14 @@ TEST_F(WebRequestRulesRegistryTest, CheckOriginAndPathRegEx) {
 
   // No match because match is in the query parameter.
   GURL url1("http://bar.com/index.html?foo.com");
-  net::TestURLRequest request1(url1, NULL, &context, NULL);
+  net::TestURLRequest request1(url1, net::DEFAULT_PRIORITY, NULL, &context);
   WebRequestData request_data1(&request1, ON_BEFORE_REQUEST);
   deltas = registry->CreateDeltas(NULL, request_data1, false);
   EXPECT_EQ(0u, deltas.size());
 
   // This is a correct match.
   GURL url2("http://foo.com/index.html");
-  net::TestURLRequest request2(url2, NULL, &context, NULL);
+  net::TestURLRequest request2(url2, net::DEFAULT_PRIORITY, NULL, &context);
   WebRequestData request_data2(&request2, ON_BEFORE_REQUEST);
   deltas = registry->CreateDeltas(NULL, request_data2, false);
   EXPECT_EQ(1u, deltas.size());
diff --git a/chrome/browser/extensions/api/web_request/web_request_api_unittest.cc b/chrome/browser/extensions/api/web_request/web_request_api_unittest.cc
index c98ceea..b563564 100644
--- a/chrome/browser/extensions/api/web_request/web_request_api_unittest.cc
+++ b/chrome/browser/extensions/api/web_request/web_request_api_unittest.cc
@@ -42,6 +42,7 @@
 #include "net/base/auth.h"
 #include "net/base/capturing_net_log.h"
 #include "net/base/net_util.h"
+#include "net/base/request_priority.h"
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/base/upload_data_stream.h"
 #include "net/base/upload_file_element_reader.h"
@@ -240,7 +241,8 @@ TEST_F(ExtensionWebRequestTest, BlockingEventPrecedenceRedirect) {
   GURL redirect_url("about:redirected");
   GURL not_chosen_redirect_url("about:not_chosen");
 
-  net::URLRequest request(GURL("about:blank"), &delegate_, context_.get());
+  net::URLRequest request(
+      GURL("about:blank"), net::DEFAULT_PRIORITY, &delegate_, context_.get());
   {
     // onBeforeRequest will be dispatched twice initially. The second response -
     // the redirect - should win, since it has a later |install_time|. The
@@ -294,7 +296,8 @@ TEST_F(ExtensionWebRequestTest, BlockingEventPrecedenceRedirect) {
   }
 
   // Now test the same thing but the extensions answer in reverse order.
-  net::URLRequest request2(GURL("about:blank"), &delegate_, context_.get());
+  net::URLRequest request2(
+      GURL("about:blank"), net::DEFAULT_PRIORITY, &delegate_, context_.get());
   {
     ExtensionWebRequestEventRouter::EventResponse* response = NULL;
 
@@ -367,7 +370,8 @@ TEST_F(ExtensionWebRequestTest, BlockingEventPrecedenceCancel) {
     ipc_sender_factory.GetWeakPtr());
 
   GURL request_url("about:blank");
-  net::URLRequest request(request_url, &delegate_, context_.get());
+  net::URLRequest request(
+      request_url, net::DEFAULT_PRIORITY, &delegate_, context_.get());
 
   // onBeforeRequest will be dispatched twice. The second response -
   // the redirect - would win, since it has a later |install_time|, but
@@ -434,7 +438,8 @@ TEST_F(ExtensionWebRequestTest, SimulateChancelWhileBlocked) {
     filter, 0, -1, -1, ipc_sender_factory.GetWeakPtr());
 
   GURL request_url("about:blank");
-  net::URLRequest request(request_url, &delegate_, context_.get());
+  net::URLRequest request(
+      request_url, net::DEFAULT_PRIORITY, &delegate_, context_.get());
 
   ExtensionWebRequestEventRouter::EventResponse* response = NULL;
 
@@ -497,7 +502,8 @@ void ExtensionWebRequestTest::FireURLRequestWithData(
     const std::vector<char>& bytes_2) {
   // The request URL can be arbitrary but must have an HTTP or HTTPS scheme.
   GURL request_url("http://www.example.com");
-  net::URLRequest request(request_url, &delegate_, context_.get());
+  net::URLRequest request(
+      request_url, net::DEFAULT_PRIORITY, &delegate_, context_.get());
   request.set_method(method);
   if (content_type != NULL)
     request.SetExtraRequestHeaderByName(net::HttpRequestHeaders::kContentType,
@@ -710,7 +716,8 @@ TEST_F(ExtensionWebRequestTest, NoAccessRequestBodyData) {
   const GURL request_url("http://www.example.com");
 
   for (size_t i = 0; i < arraysize(kMethods); ++i) {
-    net::URLRequest request(request_url, &delegate_, context_.get());
+    net::URLRequest request(
+        request_url, net::DEFAULT_PRIORITY, &delegate_, context_.get());
     request.set_method(kMethods[i]);
     ipc_sender_.PushTask(base::Bind(&base::DoNothing));
     request.Start();
@@ -829,7 +836,8 @@ TEST_P(ExtensionWebRequestHeaderModificationTest, TestModifications) {
       ipc_sender_factory.GetWeakPtr());
 
   GURL request_url("http://doesnotexist/does_not_exist.html");
-  net::URLRequest request(request_url, &delegate_, context_.get());
+  net::URLRequest request(
+      request_url, net::DEFAULT_PRIORITY, &delegate_, context_.get());
 
   // Initialize headers available before extensions are notified of the
   // onBeforeSendHeaders event.
diff --git a/chrome/browser/extensions/api/web_request/web_request_permissions_unittest.cc b/chrome/browser/extensions/api/web_request/web_request_permissions_unittest.cc
index e007317..a0eb5e7 100644
--- a/chrome/browser/extensions/api/web_request/web_request_permissions_unittest.cc
+++ b/chrome/browser/extensions/api/web_request/web_request_permissions_unittest.cc
@@ -11,6 +11,7 @@
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/test/test_browser_thread_bundle.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
@@ -90,7 +91,8 @@ TEST_F(ExtensionWebRequestHelpersTestWithThreadsTest, TestHideRequestForURL) {
   // Check that requests are rejected based on the destination
   for (size_t i = 0; i < arraysize(sensitive_urls); ++i) {
     GURL sensitive_url(sensitive_urls[i]);
-    net::TestURLRequest request(sensitive_url, NULL, &context, NULL);
+    net::TestURLRequest request(
+        sensitive_url, net::DEFAULT_PRIORITY, NULL, &context);
     EXPECT_TRUE(
         WebRequestPermissions::HideRequest(extension_info_map_.get(), &request))
         << sensitive_urls[i];
@@ -98,7 +100,8 @@ TEST_F(ExtensionWebRequestHelpersTestWithThreadsTest, TestHideRequestForURL) {
   // Check that requests are accepted if they don't touch sensitive urls.
   for (size_t i = 0; i < arraysize(non_sensitive_urls); ++i) {
     GURL non_sensitive_url(non_sensitive_urls[i]);
-    net::TestURLRequest request(non_sensitive_url, NULL, &context, NULL);
+    net::TestURLRequest request(
+        non_sensitive_url, net::DEFAULT_PRIORITY, NULL, &context);
     EXPECT_FALSE(
         WebRequestPermissions::HideRequest(extension_info_map_.get(), &request))
         << non_sensitive_urls[i];
@@ -109,7 +112,7 @@ TEST_F(ExtensionWebRequestHelpersTestWithThreadsTest, TestHideRequestForURL) {
   // Normally this request is not protected:
   GURL non_sensitive_url("http://www.google.com/test.js");
   net::TestURLRequest non_sensitive_request(
-      non_sensitive_url, NULL, &context, NULL);
+      non_sensitive_url, net::DEFAULT_PRIORITY, NULL, &context);
   EXPECT_FALSE(WebRequestPermissions::HideRequest(extension_info_map_.get(),
                                                   &non_sensitive_request));
   // If the origin is labeled by the WebStoreAppId, it becomes protected.
@@ -118,7 +121,7 @@ TEST_F(ExtensionWebRequestHelpersTestWithThreadsTest, TestHideRequestForURL) {
     int site_instance_id = 23;
     int frame_id = 17;
     net::TestURLRequest sensitive_request(
-        non_sensitive_url, NULL, &context, NULL);
+        non_sensitive_url, net::DEFAULT_PRIORITY, NULL, &context);
     ResourceRequestInfo::AllocateForTesting(
         &sensitive_request, ResourceType::SCRIPT, NULL,
         process_id, frame_id, false);
@@ -132,7 +135,7 @@ TEST_F(ExtensionWebRequestHelpersTestWithThreadsTest, TestHideRequestForURL) {
     int process_id = kSigninProcessId;
     int frame_id = 19;
     net::TestURLRequest sensitive_request(
-        non_sensitive_url, NULL, &context, NULL);
+        non_sensitive_url, net::DEFAULT_PRIORITY, NULL, &context);
     ResourceRequestInfo::AllocateForTesting(
         &sensitive_request, ResourceType::SCRIPT, NULL,
         process_id, frame_id, false);
@@ -144,7 +147,7 @@ TEST_F(ExtensionWebRequestHelpersTestWithThreadsTest, TestHideRequestForURL) {
 TEST_F(ExtensionWebRequestHelpersTestWithThreadsTest,
        TestCanExtensionAccessURL_HostPermissions) {
   net::TestURLRequest request(
-      GURL("http://example.com"), NULL, &context, NULL);
+      GURL("http://example.com"), net::DEFAULT_PRIORITY, NULL, &context);
 
   EXPECT_TRUE(WebRequestPermissions::CanExtensionAccessURL(
       extension_info_map_.get(),
diff --git a/chrome/browser/extensions/extension_protocols_unittest.cc b/chrome/browser/extensions/extension_protocols_unittest.cc
index e323cd5..aff56cc 100644
--- a/chrome/browser/extensions/extension_protocols_unittest.cc
+++ b/chrome/browser/extensions/extension_protocols_unittest.cc
@@ -18,6 +18,7 @@
 #include "content/public/test/mock_resource_context.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "extensions/common/constants.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_job_factory_impl.h"
 #include "net/url_request/url_request_status.h"
@@ -170,6 +171,7 @@ TEST_F(ExtensionProtocolTest, IncognitoRequest) {
       // is blocked, we should see ADDRESS_UNREACHABLE. Otherwise, the request
       // should just fail because the file doesn't exist.
       net::URLRequest request(extension->GetResourceURL("404.html"),
+                              net::DEFAULT_PRIORITY,
                               &test_delegate_,
                               resource_context_.GetRequestContext());
       StartRequest(&request, ResourceType::MAIN_FRAME);
@@ -187,6 +189,7 @@ TEST_F(ExtensionProtocolTest, IncognitoRequest) {
     // Now do a subframe request.
     {
       net::URLRequest request(extension->GetResourceURL("404.html"),
+                              net::DEFAULT_PRIORITY,
                               &test_delegate_,
                               resource_context_.GetRequestContext());
       StartRequest(&request, ResourceType::SUB_FRAME);
@@ -225,6 +228,7 @@ TEST_F(ExtensionProtocolTest, ComponentResourceRequest) {
   // First test it with the extension enabled.
   {
     net::URLRequest request(extension->GetResourceURL("webstore_icon_16.png"),
+                            net::DEFAULT_PRIORITY,
                             &test_delegate_,
                             resource_context_.GetRequestContext());
     StartRequest(&request, ResourceType::MEDIA);
@@ -237,6 +241,7 @@ TEST_F(ExtensionProtocolTest, ComponentResourceRequest) {
                                        UnloadedExtensionInfo::REASON_DISABLE);
   {
     net::URLRequest request(extension->GetResourceURL("webstore_icon_16.png"),
+                            net::DEFAULT_PRIORITY,
                             &test_delegate_,
                             resource_context_.GetRequestContext());
     StartRequest(&request, ResourceType::MEDIA);
@@ -256,6 +261,7 @@ TEST_F(ExtensionProtocolTest, ResourceRequestResponseHeaders) {
 
   {
     net::URLRequest request(extension->GetResourceURL("test.dat"),
+                            net::DEFAULT_PRIORITY,
                             &test_delegate_,
                             resource_context_.GetRequestContext());
     StartRequest(&request, ResourceType::MEDIA);
diff --git a/chrome/browser/extensions/user_script_listener_unittest.cc b/chrome/browser/extensions/user_script_listener_unittest.cc
index dfc81dd..0e530d4 100644
--- a/chrome/browser/extensions/user_script_listener_unittest.cc
+++ b/chrome/browser/extensions/user_script_listener_unittest.cc
@@ -16,6 +16,7 @@
 #include "content/public/browser/notification_service.h"
 #include "content/public/browser/resource_controller.h"
 #include "content/public/browser/resource_throttle.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_filter.h"
 #include "net/url_request/url_request_test_job.h"
@@ -160,7 +161,7 @@ class UserScriptListenerTest : public ExtensionServiceTestBase {
                                         net::TestURLRequestContext* context) {
     GURL url(url_string);
     net::TestURLRequest* request =
-        new net::TestURLRequest(url, delegate, context, NULL);
+        new net::TestURLRequest(url, net::DEFAULT_PRIORITY, delegate, context);
 
     ResourceThrottle* throttle =
         listener_->CreateResourceThrottle(url, ResourceType::MAIN_FRAME);
@@ -326,7 +327,7 @@ TEST_F(UserScriptListenerTest, ResumeBeforeStart) {
   net::TestURLRequestContext context;
   GURL url(kMatchingUrl);
   scoped_ptr<net::TestURLRequest> request(
-      new net::TestURLRequest(url, &delegate, &context, NULL));
+      new net::TestURLRequest(url, net::DEFAULT_PRIORITY, &delegate, &context));
 
   ResourceThrottle* throttle =
       listener_->CreateResourceThrottle(url, ResourceType::MAIN_FRAME);
diff --git a/chrome/browser/net/chrome_fraudulent_certificate_reporter.cc b/chrome/browser/net/chrome_fraudulent_certificate_reporter.cc
index 89e8b48..19775ff 100644
--- a/chrome/browser/net/chrome_fraudulent_certificate_reporter.cc
+++ b/chrome/browser/net/chrome_fraudulent_certificate_reporter.cc
@@ -12,6 +12,7 @@
 #include "base/time/time.h"
 #include "chrome/browser/net/cert_logger.pb.h"
 #include "net/base/load_flags.h"
+#include "net/base/request_priority.h"
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/base/upload_data_stream.h"
 #include "net/cert/x509_certificate.h"
@@ -55,12 +56,14 @@ static std::string BuildReport(const std::string& hostname,
   return out;
 }
 
-net::URLRequest* ChromeFraudulentCertificateReporter::CreateURLRequest(
-      net::URLRequestContext* context) {
-  net::URLRequest* request = context->CreateRequest(upload_url_, this);
+scoped_ptr<net::URLRequest>
+ChromeFraudulentCertificateReporter::CreateURLRequest(
+    net::URLRequestContext* context) {
+  scoped_ptr<net::URLRequest> request =
+      context->CreateRequest(upload_url_, net::DEFAULT_PRIORITY, this);
   request->set_load_flags(net::LOAD_DO_NOT_SEND_COOKIES |
                           net::LOAD_DO_NOT_SAVE_COOKIES);
-  return request;
+  return request.Pass();
 }
 
 void ChromeFraudulentCertificateReporter::SendReport(
@@ -76,7 +79,7 @@ void ChromeFraudulentCertificateReporter::SendReport(
 
   std::string report = BuildReport(hostname, ssl_info);
 
-  net::URLRequest* url_request = CreateURLRequest(request_context_);
+  scoped_ptr<net::URLRequest> url_request = CreateURLRequest(request_context_);
   url_request->set_method("POST");
 
   scoped_ptr<net::UploadElementReader> reader(
@@ -89,15 +92,16 @@ void ChromeFraudulentCertificateReporter::SendReport(
                     "x-application/chrome-fraudulent-cert-report");
   url_request->SetExtraRequestHeaders(headers);
 
-  inflight_requests_.insert(url_request);
-  url_request->Start();
+  net::URLRequest* raw_url_request = url_request.get();
+  inflight_requests_.insert(url_request.release());
+  raw_url_request->Start();
 }
 
 void ChromeFraudulentCertificateReporter::RequestComplete(
     net::URLRequest* request) {
   std::set<net::URLRequest*>::iterator i = inflight_requests_.find(request);
   DCHECK(i != inflight_requests_.end());
-  delete *i;
+  scoped_ptr<net::URLRequest> url_request(*i);
   inflight_requests_.erase(i);
 }
 
diff --git a/chrome/browser/net/chrome_fraudulent_certificate_reporter.h b/chrome/browser/net/chrome_fraudulent_certificate_reporter.h
index 3237972..1b1e275 100644
--- a/chrome/browser/net/chrome_fraudulent_certificate_reporter.h
+++ b/chrome/browser/net/chrome_fraudulent_certificate_reporter.h
@@ -28,7 +28,8 @@ class ChromeFraudulentCertificateReporter
 
   // Allows users of this class to override this and set their own URLRequest
   // type. Used by SendReport.
-  virtual net::URLRequest* CreateURLRequest(net::URLRequestContext* context);
+  virtual scoped_ptr<net::URLRequest> CreateURLRequest(
+      net::URLRequestContext* context);
 
   // net::FraudulentCertificateReporter
   virtual void SendReport(const std::string& hostname,
@@ -48,6 +49,7 @@ class ChromeFraudulentCertificateReporter
   void RequestComplete(net::URLRequest* request);
 
   const GURL upload_url_;
+  // Owns the contained requests.
   std::set<net::URLRequest*> inflight_requests_;
 
   DISALLOW_COPY_AND_ASSIGN(ChromeFraudulentCertificateReporter);
diff --git a/chrome/browser/net/chrome_fraudulent_certificate_reporter_unittest.cc b/chrome/browser/net/chrome_fraudulent_certificate_reporter_unittest.cc
index cf8a8c5..00a21d3 100644
--- a/chrome/browser/net/chrome_fraudulent_certificate_reporter_unittest.cc
+++ b/chrome/browser/net/chrome_fraudulent_certificate_reporter_unittest.cc
@@ -14,6 +14,7 @@
 #include "base/threading/thread.h"
 #include "chrome/browser/net/chrome_url_request_context.h"
 #include "content/public/test/test_browser_thread.h"
+#include "net/base/request_priority.h"
 #include "net/base/test_data_directory.h"
 #include "net/cert/x509_certificate.h"
 #include "net/http/transport_security_state.h"
@@ -123,7 +124,10 @@ class NotSendingTestReporter : public TestReporter {
 class MockURLRequest : public net::URLRequest {
  public:
   explicit MockURLRequest(net::URLRequestContext* context)
-      : net::URLRequest(GURL(std::string()), NULL, context) {}
+      : net::URLRequest(GURL(std::string()),
+                        net::DEFAULT_PRIORITY,
+                        NULL,
+                        context) {}
 
  private:
 };
@@ -135,9 +139,9 @@ class MockReporter : public ChromeFraudulentCertificateReporter {
   explicit MockReporter(net::URLRequestContext* request_context)
     : ChromeFraudulentCertificateReporter(request_context) {}
 
-  virtual net::URLRequest* CreateURLRequest(
+  virtual scoped_ptr<net::URLRequest> CreateURLRequest(
       net::URLRequestContext* context) OVERRIDE {
-    return new MockURLRequest(context);
+    return scoped_ptr<net::URLRequest>(new MockURLRequest(context));
   }
 
   virtual void SendReport(
diff --git a/chrome/browser/net/chrome_network_delegate_unittest.cc b/chrome/browser/net/chrome_network_delegate_unittest.cc
index 831e674..75144be 100644
--- a/chrome/browser/net/chrome_network_delegate_unittest.cc
+++ b/chrome/browser/net/chrome_network_delegate_unittest.cc
@@ -16,6 +16,7 @@
 #include "chrome/test/base/testing_profile.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "net/base/completion_callback.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -48,11 +49,11 @@ class ChromeNetworkDelegateTest : public testing::Test {
 
     net::TestURLRequestContext context;
     net::TestURLRequest extension_request(
-        GURL("http://example.com/"), NULL, &context, NULL);
+        GURL("http://example.com/"), net::DEFAULT_PRIORITY, NULL, &context);
     extension_request.set_first_party_for_cookies(
         GURL("chrome-extension://abcdef/bingo.html"));
     net::TestURLRequest web_page_request(
-        GURL("http://example.com/"), NULL, &context, NULL);
+        GURL("http://example.com/"), net::DEFAULT_PRIORITY, NULL, &context);
     web_page_request.set_first_party_for_cookies(
         GURL("http://example.com/helloworld.html"));
 
@@ -127,7 +128,7 @@ class ChromeNetworkDelegateSafeSearchTest : public testing::Test {
     SCOPED_TRACE(url_string);
 
     net::TestURLRequest request(
-        GURL(url_string), &delegate_, &context_, network_delegate_);
+        GURL(url_string), net::DEFAULT_PRIORITY, &delegate_, &context_);
 
     request.Start();
     base::MessageLoop::current()->RunUntilIdle();
diff --git a/chrome/browser/net/connection_tester.cc b/chrome/browser/net/connection_tester.cc
index 7a06aae..0d38a6c 100644
--- a/chrome/browser/net/connection_tester.cc
+++ b/chrome/browser/net/connection_tester.cc
@@ -18,6 +18,7 @@
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
+#include "net/base/request_priority.h"
 #include "net/cert/cert_verifier.h"
 #include "net/cookies/cookie_monster.h"
 #include "net/dns/host_resolver.h"
@@ -409,7 +410,8 @@ void ConnectionTester::TestRunner::ProxyConfigServiceCreated(
     return;
   }
   // Fetch a request using the experimental context.
-  request_.reset(request_context_->CreateRequest(experiment.url, this));
+  request_ = request_context_->CreateRequest(
+      experiment.url, net::DEFAULT_PRIORITY, this);
   request_->Start();
 }
 
diff --git a/chrome/browser/net/http_pipelining_compatibility_client.cc b/chrome/browser/net/http_pipelining_compatibility_client.cc
index e90fb03..75ef89d 100644
--- a/chrome/browser/net/http_pipelining_compatibility_client.cc
+++ b/chrome/browser/net/http_pipelining_compatibility_client.cc
@@ -14,6 +14,7 @@
 #include "content/public/browser/browser_thread.h"
 #include "net/base/load_flags.h"
 #include "net/base/network_change_notifier.h"
+#include "net/base/request_priority.h"
 #include "net/disk_cache/histogram_macros.h"
 #include "net/http/http_network_layer.h"
 #include "net/http/http_network_session.h"
@@ -89,8 +90,10 @@ Request::Request(int request_id,
                  net::URLRequestContext* url_request_context)
     : delegate_(delegate),
       request_id_(request_id),
-      url_request_(url_request_context->CreateRequest(
-          GURL(base_url + info.filename), this)),
+      url_request_(url_request_context->CreateRequest(GURL(base_url +
+                                                           info.filename),
+                                                      net::DEFAULT_PRIORITY,
+                                                      this)),
       info_(info),
       response_code_(0) {
   url_request_->set_load_flags(net::LOAD_BYPASS_CACHE |
diff --git a/chrome/browser/plugins/plugin_installer.cc b/chrome/browser/plugins/plugin_installer.cc
index 6801d13..d9f4546 100644
--- a/chrome/browser/plugins/plugin_installer.cc
+++ b/chrome/browser/plugins/plugin_installer.cc
@@ -24,6 +24,7 @@
 #include "content/public/browser/resource_dispatcher_host.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/common/referrer.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
 
@@ -44,7 +45,8 @@ void BeginDownload(
 
   ResourceDispatcherHost* rdh = ResourceDispatcherHost::Get();
   scoped_ptr<net::URLRequest> request(
-      resource_context->GetRequestContext()->CreateRequest(url, NULL));
+      resource_context->GetRequestContext()->CreateRequest(
+          url, net::DEFAULT_PRIORITY, NULL));
   net::Error error = rdh->BeginDownload(
       request.Pass(),
       content::Referrer(),
diff --git a/chrome/browser/policy/url_blacklist_manager_unittest.cc b/chrome/browser/policy/url_blacklist_manager_unittest.cc
index 9d71608..2f782a9 100644
--- a/chrome/browser/policy/url_blacklist_manager_unittest.cc
+++ b/chrome/browser/policy/url_blacklist_manager_unittest.cc
@@ -13,6 +13,7 @@
 #include "chrome/common/pref_names.h"
 #include "content/public/test/test_browser_thread.h"
 #include "google_apis/gaia/gaia_urls.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -496,7 +497,8 @@ TEST_F(URLBlacklistManagerTest, DontBlockResources) {
   EXPECT_TRUE(blacklist_manager_->IsURLBlocked(GURL("http://google.com")));
 
   net::TestURLRequestContext context;
-  net::URLRequest request(GURL("http://google.com"), NULL, &context);
+  net::URLRequest request(
+      GURL("http://google.com"), net::DEFAULT_PRIORITY, NULL, &context);
 
   // Background requests aren't filtered.
   EXPECT_FALSE(blacklist_manager_->IsRequestBlocked(request));
@@ -515,7 +517,7 @@ TEST_F(URLBlacklistManagerTest, DontBlockResources) {
 
   GURL sync_url(GaiaUrls::GetInstance()->service_login_url().Resolve(
       "?service=chromiumsync"));
-  net::URLRequest sync_request(sync_url, NULL, &context);
+  net::URLRequest sync_request(sync_url, net::DEFAULT_PRIORITY, NULL, &context);
   sync_request.set_load_flags(net::LOAD_MAIN_FRAME);
   EXPECT_EQ(block_signin_urls,
             blacklist_manager_->IsRequestBlocked(sync_request));
diff --git a/chrome/browser/predictors/resource_prefetcher.cc b/chrome/browser/predictors/resource_prefetcher.cc
index 9acbe08..0a1a65b 100644
--- a/chrome/browser/predictors/resource_prefetcher.cc
+++ b/chrome/browser/predictors/resource_prefetcher.cc
@@ -9,6 +9,8 @@
 #include "base/stl_util.h"
 #include "content/public/browser/browser_thread.h"
 #include "net/base/io_buffer.h"
+#include "net/base/request_priority.h"
+#include "net/url_request/url_request_context.h"
 
 namespace {
 
@@ -121,17 +123,14 @@ void ResourcePrefetcher::TryToLaunchPrefetchRequests() {
 void ResourcePrefetcher::SendRequest(Request* request) {
   request->prefetch_status = Request::PREFETCH_STATUS_STARTED;
 
-  net::URLRequest* url_request =
-      new net::URLRequest(request->resource_url,
-                          this,
-                          delegate_->GetURLRequestContext());
+  net::URLRequest* url_request = new net::URLRequest(
+      request->resource_url, net::LOW, this, delegate_->GetURLRequestContext());
   inflight_requests_[url_request] = request;
   host_inflight_counts_[url_request->original_url().host()] += 1;
 
   url_request->set_method("GET");
   url_request->set_first_party_for_cookies(navigation_id_.main_frame_url);
   url_request->SetReferrer(navigation_id_.main_frame_url.spec());
-  url_request->SetPriority(net::LOW);
   StartURLRequest(url_request);
 }
 
diff --git a/chrome/browser/prerender/prerender_tracker_unittest.cc b/chrome/browser/prerender/prerender_tracker_unittest.cc
index 2ee44da..b96159a 100644
--- a/chrome/browser/prerender/prerender_tracker_unittest.cc
+++ b/chrome/browser/prerender/prerender_tracker_unittest.cc
@@ -20,6 +20,7 @@
 #include "content/public/browser/resource_request_info.h"
 #include "content/public/test/test_browser_thread.h"
 #include "content/test/net/url_request_mock_http_job.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ -527,9 +528,10 @@ TEST_F(PrerenderTrackerTest, PrerenderThrottledRedirectResume) {
   net::TestURLRequestContext url_request_context;
   DeferredRedirectDelegate delegate;
   net::URLRequest request(
-      content::URLRequestMockHTTPJob::GetMockUrl(
-          base::FilePath(kRedirectPath)),
-      &delegate, &url_request_context);
+      content::URLRequestMockHTTPJob::GetMockUrl(base::FilePath(kRedirectPath)),
+      net::DEFAULT_PRIORITY,
+      &delegate,
+      &url_request_context);
   content::ResourceRequestInfo::AllocateForTesting(
       &request, ResourceType::IMAGE, NULL,
       kDefaultChildId, kDefaultRouteId, true);
@@ -566,9 +568,10 @@ TEST_F(PrerenderTrackerTest, PrerenderThrottledRedirectCancel) {
   net::TestURLRequestContext url_request_context;
   DeferredRedirectDelegate delegate;
   net::URLRequest request(
-      content::URLRequestMockHTTPJob::GetMockUrl(
-          base::FilePath(kRedirectPath)),
-      &delegate, &url_request_context);
+      content::URLRequestMockHTTPJob::GetMockUrl(base::FilePath(kRedirectPath)),
+      net::DEFAULT_PRIORITY,
+      &delegate,
+      &url_request_context);
   content::ResourceRequestInfo::AllocateForTesting(
       &request, ResourceType::IMAGE, NULL,
       kDefaultChildId, kDefaultRouteId, true);
@@ -605,9 +608,10 @@ TEST_F(PrerenderTrackerTest, PrerenderThrottledRedirectMainFrame) {
   net::TestURLRequestContext url_request_context;
   DeferredRedirectDelegate delegate;
   net::URLRequest request(
-      content::URLRequestMockHTTPJob::GetMockUrl(
-          base::FilePath(kRedirectPath)),
-      &delegate, &url_request_context);
+      content::URLRequestMockHTTPJob::GetMockUrl(base::FilePath(kRedirectPath)),
+      net::DEFAULT_PRIORITY,
+      &delegate,
+      &url_request_context);
   content::ResourceRequestInfo::AllocateForTesting(
       &request, ResourceType::MAIN_FRAME, NULL,
       kDefaultChildId, kDefaultRouteId, true);
@@ -643,9 +647,10 @@ TEST_F(PrerenderTrackerTest, PrerenderThrottledRedirectSyncXHR) {
   net::TestURLRequestContext url_request_context;
   DeferredRedirectDelegate delegate;
   net::URLRequest request(
-      content::URLRequestMockHTTPJob::GetMockUrl(
-          base::FilePath(kRedirectPath)),
-      &delegate, &url_request_context);
+      content::URLRequestMockHTTPJob::GetMockUrl(base::FilePath(kRedirectPath)),
+      net::DEFAULT_PRIORITY,
+      &delegate,
+      &url_request_context);
   content::ResourceRequestInfo::AllocateForTesting(
       &request, ResourceType::XHR, NULL,
       kDefaultChildId, kDefaultRouteId, false);
diff --git a/chrome/browser/search/iframe_source_unittest.cc b/chrome/browser/search/iframe_source_unittest.cc
index 252a8cd..7df025d 100644
--- a/chrome/browser/search/iframe_source_unittest.cc
+++ b/chrome/browser/search/iframe_source_unittest.cc
@@ -14,6 +14,7 @@
 #include "content/public/test/mock_resource_context.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "grit/browser_resources.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_test_util.h"
@@ -96,7 +97,9 @@ class IframeSourceTest : public testing::Test {
       int render_process_id,
       int render_view_id) {
     net::URLRequest* request =
-        new net::URLRequest(GURL(url), NULL,
+        new net::URLRequest(GURL(url),
+                            net::DEFAULT_PRIORITY,
+                            NULL,
                             resource_context_.GetRequestContext());
     if (allocate_info) {
       content::ResourceRequestInfo::AllocateForTesting(request,
diff --git a/chrome/browser/ssl/ssl_client_certificate_selector_test.cc b/chrome/browser/ssl/ssl_client_certificate_selector_test.cc
index da8e463..429980b 100644
--- a/chrome/browser/ssl/ssl_client_certificate_selector_test.cc
+++ b/chrome/browser/ssl/ssl_client_certificate_selector_test.cc
@@ -12,6 +12,7 @@
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/test/browser_test_utils.h"
+#include "net/base/request_priority.h"
 #include "net/base/test_data_directory.h"
 #include "net/cert/x509_certificate.h"
 #include "net/http/http_transaction_factory.h"
@@ -78,7 +79,7 @@ void SSLClientCertificateSelectorTestBase::CleanUpOnMainThread() {
 }
 
 void SSLClientCertificateSelectorTestBase::SetUpOnIOThread() {
-  url_request_ = MakeURLRequest(url_request_context_getter_.get());
+  url_request_ = MakeURLRequest(url_request_context_getter_.get()).release();
 
   auth_requestor_ = new StrictMock<SSLClientAuthRequestorMock>(
       url_request_, cert_request_info_.get());
@@ -92,10 +93,11 @@ void SSLClientCertificateSelectorTestBase::CleanUpOnIOThread() {
   io_loop_finished_event_.Signal();
 }
 
-net::URLRequest* SSLClientCertificateSelectorTestBase::MakeURLRequest(
+scoped_ptr<net::URLRequest>
+SSLClientCertificateSelectorTestBase::MakeURLRequest(
     net::URLRequestContextGetter* context_getter) {
-  net::URLRequest* request =
+  scoped_ptr<net::URLRequest> request =
       context_getter->GetURLRequestContext()->CreateRequest(
-          GURL("https://example"), NULL);
-  return request;
+          GURL("https://example"), net::DEFAULT_PRIORITY, NULL);
+  return request.Pass();
 }
diff --git a/chrome/browser/ssl/ssl_client_certificate_selector_test.h b/chrome/browser/ssl/ssl_client_certificate_selector_test.h
index f0931db..a95ddac 100644
--- a/chrome/browser/ssl/ssl_client_certificate_selector_test.h
+++ b/chrome/browser/ssl/ssl_client_certificate_selector_test.h
@@ -5,6 +5,7 @@
 #ifndef CHROME_BROWSER_SSL_SSL_CLIENT_CERTIFICATE_SELECTOR_TEST_H_
 #define CHROME_BROWSER_SSL_SSL_CLIENT_CERTIFICATE_SELECTOR_TEST_H_
 
+#include "base/memory/scoped_ptr.h"
 #include "base/synchronization/waitable_event.h"
 #include "chrome/browser/ssl/ssl_client_auth_requestor_mock.h"
 #include "chrome/test/base/in_process_browser_test.h"
@@ -28,7 +29,7 @@ class SSLClientCertificateSelectorTestBase : public InProcessBrowserTest {
   virtual void CleanUpOnIOThread();
 
  protected:
-  net::URLRequest* MakeURLRequest(
+  scoped_ptr<net::URLRequest> MakeURLRequest(
       net::URLRequestContextGetter* context_getter);
 
   base::WaitableEvent io_loop_finished_event_;
diff --git a/chrome/browser/ui/views/ssl_client_certificate_selector_browsertest.cc b/chrome/browser/ui/views/ssl_client_certificate_selector_browsertest.cc
index 7866f1b..77687f5 100644
--- a/chrome/browser/ui/views/ssl_client_certificate_selector_browsertest.cc
+++ b/chrome/browser/ui/views/ssl_client_certificate_selector_browsertest.cc
@@ -15,6 +15,7 @@
 #include "chrome/test/base/ui_test_utils.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/test/browser_test_utils.h"
+#include "net/base/request_priority.h"
 #include "net/base/test_data_directory.h"
 #include "net/cert/x509_certificate.h"
 #include "net/http/http_transaction_factory.h"
@@ -81,7 +82,7 @@ class SSLClientCertificateSelectorTest : public InProcessBrowserTest {
   }
 
   virtual void SetUpOnIOThread() {
-    url_request_ = MakeURLRequest(url_request_context_getter_);
+    url_request_ = MakeURLRequest(url_request_context_getter_).release();
 
     auth_requestor_ = new StrictMock<SSLClientAuthRequestorMock>(
         url_request_,
@@ -109,12 +110,10 @@ class SSLClientCertificateSelectorTest : public InProcessBrowserTest {
   }
 
  protected:
-  net::URLRequest* MakeURLRequest(
+  scoped_ptr<net::URLRequest> MakeURLRequest(
       net::URLRequestContextGetter* context_getter) {
-    net::URLRequest* request =
-        context_getter->GetURLRequestContext()->CreateRequest(
-            GURL("https://example"), NULL);
-    return request;
+    return context_getter->GetURLRequestContext()->CreateRequest(
+        GURL("https://example"), net::DEFAULT_PRIORITY, NULL);
   }
 
   base::WaitableEvent io_loop_finished_event_;
@@ -180,8 +179,8 @@ class SSLClientCertificateSelectorMultiTabTest
   }
 
   virtual void SetUpOnIOThread() OVERRIDE {
-    url_request_1_ = MakeURLRequest(url_request_context_getter_);
-    url_request_2_ = MakeURLRequest(url_request_context_getter_);
+    url_request_1_ = MakeURLRequest(url_request_context_getter_).release();
+    url_request_2_ = MakeURLRequest(url_request_context_getter_).release();
 
     auth_requestor_1_ = new StrictMock<SSLClientAuthRequestorMock>(
         url_request_1_,
@@ -247,7 +246,7 @@ class SSLClientCertificateSelectorMultiProfileTest
   }
 
   virtual void SetUpOnIOThread() OVERRIDE {
-    url_request_1_ = MakeURLRequest(url_request_context_getter_1_);
+    url_request_1_ = MakeURLRequest(url_request_context_getter_1_).release();
 
     auth_requestor_1_ = new StrictMock<SSLClientAuthRequestorMock>(
         url_request_1_,
diff --git a/chrome_frame/test/test_server_test.cc b/chrome_frame/test/test_server_test.cc
index 74c8c97..92d8e0e 100644
--- a/chrome_frame/test/test_server_test.cc
+++ b/chrome_frame/test/test_server_test.cc
@@ -11,6 +11,7 @@
 #include "base/strings/stringprintf.h"
 #include "base/win/scoped_handle.h"
 #include "chrome_frame/test/test_server.h"
+#include "net/base/request_priority.h"
 #include "net/cookies/cookie_monster.h"
 #include "net/disk_cache/disk_cache.h"
 #include "net/dns/host_resolver_proc.h"
@@ -64,10 +65,10 @@ class ScopedInternet {
 class TestURLRequest : public net::URLRequest {
  public:
   TestURLRequest(const GURL& url,
+                 net::RequestPriority priority,
                  Delegate* delegate,
-                 net::TestURLRequestContext* context)
-      : net::URLRequest(url, delegate, context) {
-  }
+                 const net::TestURLRequestContext* context)
+      : net::URLRequest(url, priority, delegate, context) {}
 };
 
 class UrlTaskChain {
@@ -82,7 +83,7 @@ class UrlTaskChain {
     base::MessageLoopForIO loop;
 
     net::TestURLRequestContext context;
-    TestURLRequest r(GURL(url_), &delegate_, &context);
+    TestURLRequest r(GURL(url_), net::DEFAULT_PRIORITY, &delegate_, &context);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
diff --git a/cloud_print/service/service_state.cc b/cloud_print/service/service_state.cc
index 68d3a89..fff7694 100644
--- a/cloud_print/service/service_state.cc
+++ b/cloud_print/service/service_state.cc
@@ -13,6 +13,7 @@
 #include "net/base/escape.h"
 #include "net/base/io_buffer.h"
 #include "net/base/load_flags.h"
+#include "net/base/request_priority.h"
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/base/upload_data_stream.h"
 #include "net/url_request/url_request.h"
@@ -174,7 +175,8 @@ std::string ServiceState::LoginToGoogle(const std::string& service,
   post_body += "&source=" + net::EscapeUrlEncodedData("CP-Service", true);
   post_body += "&service=" + net::EscapeUrlEncodedData(service, true);
 
-  net::URLRequest request(url, &fetcher_delegate, context.get());
+  net::URLRequest request(
+      url, net::DEFAULT_PRIORITY, &fetcher_delegate, context.get());
   int load_flags = request.load_flags();
   load_flags = load_flags | net::LOAD_DO_NOT_SEND_COOKIES;
   load_flags = load_flags | net::LOAD_DO_NOT_SAVE_COOKIES;
diff --git a/components/navigation_interception/intercept_navigation_resource_throttle_unittest.cc b/components/navigation_interception/intercept_navigation_resource_throttle_unittest.cc
index 3ac238c..86970564 100644
--- a/components/navigation_interception/intercept_navigation_resource_throttle_unittest.cc
+++ b/components/navigation_interception/intercept_navigation_resource_throttle_unittest.cc
@@ -22,6 +22,7 @@
 #include "content/public/common/page_transition_types.h"
 #include "content/public/test/mock_resource_context.h"
 #include "content/public/test/test_renderer_host.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_response_info.h"
 #include "net/url_request/url_request.h"
@@ -118,7 +119,10 @@ class TestIOThreadState {
                     RedirectMode redirect_mode,
                     MockInterceptCallbackReceiver* callback_receiver)
       : resource_context_(&test_url_request_context_),
-        request_(url, NULL, resource_context_.GetRequestContext()) {
+        request_(url,
+                 net::DEFAULT_PRIORITY,
+                 NULL,
+                 resource_context_.GetRequestContext()) {
     DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::IO));
     if (render_process_id != MSG_ROUTING_NONE &&
         render_view_id != MSG_ROUTING_NONE) {
diff --git a/content/browser/download/download_manager_impl.cc b/content/browser/download/download_manager_impl.cc
index 36967c5..bd66f06 100644
--- a/content/browser/download/download_manager_impl.cc
+++ b/content/browser/download/download_manager_impl.cc
@@ -40,6 +40,7 @@
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/referrer.h"
 #include "net/base/load_flags.h"
+#include "net/base/request_priority.h"
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/base/upload_data_stream.h"
 #include "net/url_request/url_request_context.h"
@@ -55,7 +56,7 @@ void BeginDownload(scoped_ptr<DownloadUrlParameters> params,
   // we must down cast. RDHI is the only subclass of RDH as of 2012 May 4.
   scoped_ptr<net::URLRequest> request(
       params->resource_context()->GetRequestContext()->CreateRequest(
-          params->url(), NULL));
+          params->url(), net::DEFAULT_PRIORITY, NULL));
   request->set_load_flags(request->load_flags() | params->load_flags());
   request->set_method(params->method());
   if (!params->post_body().empty()) {
diff --git a/content/browser/fileapi/blob_url_request_job_unittest.cc b/content/browser/fileapi/blob_url_request_job_unittest.cc
index 90da3aa..93cacb24 100644
--- a/content/browser/fileapi/blob_url_request_job_unittest.cc
+++ b/content/browser/fileapi/blob_url_request_job_unittest.cc
@@ -12,6 +12,7 @@
 #include "base/time/time.h"
 #include "content/public/test/test_file_system_context.h"
 #include "net/base/io_buffer.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_request_headers.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request.h"
@@ -237,8 +238,8 @@ class BlobURLRequestJobTest : public testing::Test {
 
   void TestRequest(const std::string& method,
                    const net::HttpRequestHeaders& extra_headers) {
-    request_.reset(url_request_context_.CreateRequest(
-        GURL("blob:blah"), &url_request_delegate_));
+    request_ = url_request_context_.CreateRequest(
+        GURL("blob:blah"), net::DEFAULT_PRIORITY, &url_request_delegate_);
     request_->set_method(method);
     if (!extra_headers.IsEmpty())
       request_->SetExtraRequestHeaders(extra_headers);
diff --git a/content/browser/fileapi/file_system_dir_url_request_job_unittest.cc b/content/browser/fileapi/file_system_dir_url_request_job_unittest.cc
index 79eb9f5..874e61b 100644
--- a/content/browser/fileapi/file_system_dir_url_request_job_unittest.cc
+++ b/content/browser/fileapi/file_system_dir_url_request_job_unittest.cc
@@ -18,6 +18,7 @@
 #include "content/public/test/test_file_system_context.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_request_headers.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
@@ -82,7 +83,8 @@ class FileSystemDirURLRequestJobTest : public testing::Test {
                          FileSystemContext* file_system_context) {
     delegate_.reset(new net::TestDelegate());
     delegate_->set_quit_on_redirect(true);
-    request_.reset(empty_context_.CreateRequest(url, delegate_.get()));
+    request_ = empty_context_.CreateRequest(
+        url, net::DEFAULT_PRIORITY, delegate_.get());
     job_ = new FileSystemDirURLRequestJob(
         request_.get(), NULL, file_system_context);
 
diff --git a/content/browser/fileapi/file_system_url_request_job_unittest.cc b/content/browser/fileapi/file_system_url_request_job_unittest.cc
index 3df243f..f414332 100644
--- a/content/browser/fileapi/file_system_url_request_job_unittest.cc
+++ b/content/browser/fileapi/file_system_url_request_job_unittest.cc
@@ -25,6 +25,7 @@
 #include "net/base/mime_util.h"
 #include "net/base/net_errors.h"
 #include "net/base/net_util.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_request_headers.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
@@ -97,7 +98,8 @@ class FileSystemURLRequestJobTest : public testing::Test {
     // Make delegate_ exit the MessageLoop when the request is done.
     delegate_->set_quit_on_complete(true);
     delegate_->set_quit_on_redirect(true);
-    request_.reset(empty_context_.CreateRequest(url, delegate_.get()));
+    request_ = empty_context_.CreateRequest(
+        url, net::DEFAULT_PRIORITY, delegate_.get());
     if (headers)
       request_->SetExtraRequestHeaders(*headers);
     ASSERT_TRUE(!job_);
diff --git a/content/browser/fileapi/file_writer_delegate_unittest.cc b/content/browser/fileapi/file_writer_delegate_unittest.cc
index db0dba6..c18877f 100644
--- a/content/browser/fileapi/file_writer_delegate_unittest.cc
+++ b/content/browser/fileapi/file_writer_delegate_unittest.cc
@@ -13,6 +13,7 @@
 #include "base/run_loop.h"
 #include "content/public/test/test_file_system_context.h"
 #include "net/base/io_buffer.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_job.h"
@@ -129,8 +130,8 @@ class FileWriterDelegateTest : public PlatformTest {
                        int64 allowed_growth) {
     file_writer_delegate_.reset(
         CreateWriterDelegate(test_file_path, offset, allowed_growth));
-    request_.reset(empty_context_.CreateRequest(
-        blob_url, file_writer_delegate_.get()));
+    request_ = empty_context_.CreateRequest(
+        blob_url, net::DEFAULT_PRIORITY, file_writer_delegate_.get());
   }
 
   static net::URLRequest::ProtocolFactory Factory;
@@ -326,8 +327,8 @@ TEST_F(FileWriterDelegateTest, WriteSuccessWithoutQuotaLimitConcurrent) {
 
   // Credate another FileWriterDelegate for concurrent write.
   file_writer_delegate2.reset(CreateWriterDelegate("test2", 0, kint64max));
-  request2.reset(empty_context_.CreateRequest(
-      kBlobURL2, file_writer_delegate2.get()));
+  request2 = empty_context_.CreateRequest(
+      kBlobURL2, net::DEFAULT_PRIORITY, file_writer_delegate2.get());
 
   Result result, result2;
   ASSERT_EQ(0, usage());
diff --git a/content/browser/loader/resource_dispatcher_host_impl.cc b/content/browser/loader/resource_dispatcher_host_impl.cc
index 657b385..1e66263 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -1040,7 +1040,8 @@ void ResourceDispatcherHostImpl::BeginRequest(
   // Construct the request.
   scoped_ptr<net::URLRequest> new_request;
   net::URLRequest* request;
-  new_request.reset(request_context->CreateRequest(request_data.url, NULL));
+  new_request = request_context->CreateRequest(
+      request_data.url, request_data.priority, NULL);
   request = new_request.get();
 
   request->set_method(request_data.method);
@@ -1052,7 +1053,6 @@ void ResourceDispatcherHostImpl::BeginRequest(
   request->SetExtraRequestHeaders(headers);
 
   request->set_load_flags(load_flags);
-  request->SetPriority(request_data.priority);
 
   // Resolve elements from request_body and prepare upload data.
   if (request_data.request_body.get()) {
@@ -1293,7 +1293,7 @@ void ResourceDispatcherHostImpl::BeginSaveFile(
   }
 
   scoped_ptr<net::URLRequest> request(
-      request_context->CreateRequest(url, NULL));
+      request_context->CreateRequest(url, net::DEFAULT_PRIORITY, NULL));
   request->set_method("GET");
   SetReferrerForRequest(request.get(), referrer);
 
diff --git a/content/browser/loader/resource_dispatcher_host_unittest.cc b/content/browser/loader/resource_dispatcher_host_unittest.cc
index 4939b80..900b5d1 100644
--- a/content/browser/loader/resource_dispatcher_host_unittest.cc
+++ b/content/browser/loader/resource_dispatcher_host_unittest.cc
@@ -32,6 +32,7 @@
 #include "content/public/test/test_browser_context.h"
 #include "content/test/test_content_browser_client.h"
 #include "net/base/net_errors.h"
+#include "net/base/request_priority.h"
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/base/upload_data_stream.h"
 #include "net/http/http_util.h"
@@ -1514,7 +1515,8 @@ TEST_F(ResourceDispatcherHostTest, TestBlockedRequestsDontLeak) {
 // Test the private helper method "CalculateApproximateMemoryCost()".
 TEST_F(ResourceDispatcherHostTest, CalculateApproximateMemoryCost) {
   net::URLRequestContext context;
-  net::URLRequest req(GURL("http://www.google.com"), NULL, &context);
+  net::URLRequest req(
+      GURL("http://www.google.com"), net::DEFAULT_PRIORITY, NULL, &context);
   EXPECT_EQ(4427,
             ResourceDispatcherHostImpl::CalculateApproximateMemoryCost(&req));
 
diff --git a/content/browser/loader/resource_loader_unittest.cc b/content/browser/loader/resource_loader_unittest.cc
index d228300..194930e 100644
--- a/content/browser/loader/resource_loader_unittest.cc
+++ b/content/browser/loader/resource_loader_unittest.cc
@@ -11,6 +11,7 @@
 #include "content/public/test/mock_resource_context.h"
 #include "content/public/test/test_browser_thread_bundle.h"
 #include "content/test/test_content_browser_client.h"
+#include "net/base/request_priority.h"
 #include "net/cert/x509_certificate.h"
 #include "net/ssl/client_cert_store.h"
 #include "net/ssl/ssl_cert_request_info.h"
@@ -211,9 +212,11 @@ TEST_F(ResourceLoaderTest, ClientCertStoreLookup) {
   const int kRenderProcessId = 1;
   const int kRenderViewId = 2;
 
-  scoped_ptr<net::URLRequest> request(new net::URLRequest(
-      GURL("dummy"), NULL,
-      resource_context_.GetRequestContext()));
+  scoped_ptr<net::URLRequest> request(
+      new net::URLRequest(GURL("dummy"),
+                          net::DEFAULT_PRIORITY,
+                          NULL,
+                          resource_context_.GetRequestContext()));
   ResourceRequestInfo::AllocateForTesting(request.get(),
                                           ResourceType::MAIN_FRAME,
                                           &resource_context_,
@@ -274,8 +277,11 @@ TEST_F(ResourceLoaderTest, ClientCertStoreNull) {
   const int kRenderProcessId = 1;
   const int kRenderViewId = 2;
 
-  scoped_ptr<net::URLRequest> request(new net::URLRequest(
-      GURL("dummy"), NULL, resource_context_.GetRequestContext()));
+  scoped_ptr<net::URLRequest> request(
+      new net::URLRequest(GURL("dummy"),
+                          net::DEFAULT_PRIORITY,
+                          NULL,
+                          resource_context_.GetRequestContext()));
   ResourceRequestInfo::AllocateForTesting(request.get(),
                                           ResourceType::MAIN_FRAME,
                                           &resource_context_,
diff --git a/content/browser/loader/resource_scheduler_unittest.cc b/content/browser/loader/resource_scheduler_unittest.cc
index adcb74e..dade9ff 100644
--- a/content/browser/loader/resource_scheduler_unittest.cc
+++ b/content/browser/loader/resource_scheduler_unittest.cc
@@ -17,6 +17,7 @@
 #include "content/public/browser/resource_throttle.h"
 #include "content/public/common/process_type.h"
 #include "net/base/host_port_pair.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_server_properties_impl.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_test_util.h"
@@ -139,8 +140,7 @@ class ResourceSchedulerTest : public testing::Test {
       net::RequestPriority priority,
       int route_id) {
     scoped_ptr<net::URLRequest> url_request(
-        context_.CreateRequest(GURL(url), NULL));
-    url_request->SetPriority(priority);
+        context_.CreateRequest(GURL(url), priority, NULL));
     ResourceRequestInfoImpl* info = new ResourceRequestInfoImpl(
         PROCESS_TYPE_RENDERER,             // process_type
         kChildId,                          // child_id
diff --git a/content/browser/renderer_host/render_message_filter.cc b/content/browser/renderer_host/render_message_filter.cc
index 7fd1870..f926ff6 100644
--- a/content/browser/renderer_host/render_message_filter.cc
+++ b/content/browser/renderer_host/render_message_filter.cc
@@ -834,7 +834,8 @@ void RenderMessageFilter::OnDownloadUrl(const IPC::Message& message,
   scoped_ptr<DownloadSaveInfo> save_info(new DownloadSaveInfo());
   save_info->suggested_name = suggested_name;
   scoped_ptr<net::URLRequest> request(
-      resource_context_->GetRequestContext()->CreateRequest(url, NULL));
+      resource_context_->GetRequestContext()->CreateRequest(
+          url, net::DEFAULT_PRIORITY, NULL));
   RecordDownloadSource(INITIATED_BY_RENDERER);
   resource_dispatcher_host_->BeginDownload(
       request.Pass(),
diff --git a/content/browser/streams/stream_url_request_job_unittest.cc b/content/browser/streams/stream_url_request_job_unittest.cc
index 8914fe5..464f916 100644
--- a/content/browser/streams/stream_url_request_job_unittest.cc
+++ b/content/browser/streams/stream_url_request_job_unittest.cc
@@ -8,6 +8,7 @@
 #include "content/browser/streams/stream_registry.h"
 #include "content/browser/streams/stream_url_request_job.h"
 #include "content/browser/streams/stream_write_observer.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
@@ -73,7 +74,8 @@ class StreamURLRequestJobTest : public testing::Test {
                    int expected_status_code,
                    const std::string& expected_response) {
     net::TestDelegate delegate;
-    request_.reset(url_request_context_.CreateRequest(url, &delegate));
+    request_ = url_request_context_.CreateRequest(
+        url, net::DEFAULT_PRIORITY, &delegate);
     request_->set_method(method);
     if (!extra_headers.IsEmpty())
       request_->SetExtraRequestHeaders(extra_headers);
@@ -130,7 +132,8 @@ TEST_F(StreamURLRequestJobTest, TestGetLargeStreamRequest) {
 
 TEST_F(StreamURLRequestJobTest, TestGetNonExistentStreamRequest) {
   net::TestDelegate delegate;
-  request_.reset(url_request_context_.CreateRequest(kStreamURL, &delegate));
+  request_ = url_request_context_.CreateRequest(
+      kStreamURL, net::DEFAULT_PRIORITY, &delegate);
   request_->set_method("GET");
   request_->Start();
 
diff --git a/net/ocsp/nss_ocsp.cc b/net/ocsp/nss_ocsp.cc
index aea8fc2..d83b239 100644
--- a/net/ocsp/nss_ocsp.cc
+++ b/net/ocsp/nss_ocsp.cc
@@ -32,6 +32,7 @@
 #include "net/base/host_port_pair.h"
 #include "net/base/io_buffer.h"
 #include "net/base/load_flags.h"
+#include "net/base/request_priority.h"
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/base/upload_data_stream.h"
 #include "net/http/http_request_headers.h"
@@ -393,7 +394,8 @@ class OCSPRequestSession
       g_ocsp_io_loop.Get().AddRequest(this);
     }
 
-    request_ = new URLRequest(url_, this, url_request_context);
+    request_ =
+        new URLRequest(url_, DEFAULT_PRIORITY, this, url_request_context);
     // To meet the privacy requirements of incognito mode.
     request_->set_load_flags(LOAD_DISABLE_CACHE | LOAD_DO_NOT_SAVE_COOKIES |
                              LOAD_DO_NOT_SEND_COOKIES);
diff --git a/net/proxy/proxy_script_fetcher_impl.cc b/net/proxy/proxy_script_fetcher_impl.cc
index f8925fa..68a8205 100644
--- a/net/proxy/proxy_script_fetcher_impl.cc
+++ b/net/proxy/proxy_script_fetcher_impl.cc
@@ -13,6 +13,7 @@
 #include "net/base/io_buffer.h"
 #include "net/base/load_flags.h"
 #include "net/base/net_errors.h"
+#include "net/base/request_priority.h"
 #include "net/cert/cert_status_flags.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request_context.h"
@@ -133,7 +134,8 @@ int ProxyScriptFetcherImpl::Fetch(
     return OK;
   }
 
-  cur_request_.reset(url_request_context_->CreateRequest(url, this));
+  cur_request_ =
+      url_request_context_->CreateRequest(url, DEFAULT_PRIORITY, this);
   cur_request_->set_method("GET");
 
   // Make sure that the PAC script is downloaded using a direct connection,
diff --git a/net/spdy/spdy_network_transaction_unittest.cc b/net/spdy/spdy_network_transaction_unittest.cc
index 46cebe3..780d147 100644
--- a/net/spdy/spdy_network_transaction_unittest.cc
+++ b/net/spdy/spdy_network_transaction_unittest.cc
@@ -2466,8 +2466,10 @@ TEST_P(SpdyNetworkTransactionTest, RedirectGetRequest) {
   TestDelegate d;
   {
     SpdyURLRequestContext spdy_url_request_context(GetParam().protocol);
-    net::URLRequest r(
-        GURL("http://www.google.com/"), &d, &spdy_url_request_context);
+    net::URLRequest r(GURL("http://www.google.com/"),
+                      DEFAULT_PRIORITY,
+                      &d,
+                      &spdy_url_request_context);
     spdy_url_request_context.socket_factory().
         AddSocketDataProvider(&data);
     spdy_url_request_context.socket_factory().
@@ -2559,8 +2561,10 @@ TEST_P(SpdyNetworkTransactionTest, RedirectServerPush) {
   TestDelegate d2;
   SpdyURLRequestContext spdy_url_request_context(GetParam().protocol);
   {
-    net::URLRequest r(
-        GURL("http://www.google.com/"), &d, &spdy_url_request_context);
+    net::URLRequest r(GURL("http://www.google.com/"),
+                      DEFAULT_PRIORITY,
+                      &d,
+                      &spdy_url_request_context);
     spdy_url_request_context.socket_factory().
         AddSocketDataProvider(&data);
 
@@ -2571,8 +2575,10 @@ TEST_P(SpdyNetworkTransactionTest, RedirectServerPush) {
     std::string contents("hello!");
     EXPECT_EQ(contents, d.data_received());
 
-    net::URLRequest r2(
-        GURL("http://www.google.com/foo.dat"), &d2, &spdy_url_request_context);
+    net::URLRequest r2(GURL("http://www.google.com/foo.dat"),
+                       DEFAULT_PRIORITY,
+                       &d2,
+                       &spdy_url_request_context);
     spdy_url_request_context.socket_factory().
         AddSocketDataProvider(&data2);
 
diff --git a/net/test/spawned_test_server/spawner_communicator.cc b/net/test/spawned_test_server/spawner_communicator.cc
index f93ff97..3887157 100644
--- a/net/test/spawned_test_server/spawner_communicator.cc
+++ b/net/test/spawned_test_server/spawner_communicator.cc
@@ -13,6 +13,7 @@
 #include "base/values.h"
 #include "build/build_config.h"
 #include "net/base/net_util.h"
+#include "net/base/request_priority.h"
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/base/upload_data_stream.h"
 #include "net/http/http_response_headers.h"
@@ -171,9 +172,9 @@ void SpawnerCommunicator::SendCommandAndWaitForResultOnIOThread(
   // Prepare the URLRequest for sending the command.
   DCHECK(!cur_request_.get());
   context_.reset(new TestURLRequestContext);
-  cur_request_.reset(context_->CreateRequest(
-      GenerateSpawnerCommandURL(command, port_), this));
-  DCHECK(cur_request_.get());
+  cur_request_ = context_->CreateRequest(
+      GenerateSpawnerCommandURL(command, port_), DEFAULT_PRIORITY, this);
+  DCHECK(cur_request_);
   int current_request_id = ++next_id_;
   SpawnerRequestData* data = new SpawnerRequestData(current_request_id,
                                                     result_code,
diff --git a/net/url_request/url_fetcher_core.cc b/net/url_request/url_fetcher_core.cc
index bd28b4b..113ced7 100644
--- a/net/url_request/url_fetcher_core.cc
+++ b/net/url_request/url_fetcher_core.cc
@@ -14,6 +14,7 @@
 #include "net/base/io_buffer.h"
 #include "net/base/load_flags.h"
 #include "net/base/net_errors.h"
+#include "net/base/request_priority.h"
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/base/upload_data_stream.h"
 #include "net/base/upload_file_element_reader.h"
@@ -502,8 +503,8 @@ void URLFetcherCore::StartURLRequest() {
 
   g_registry.Get().AddURLFetcherCore(this);
   current_response_bytes_ = 0;
-  request_.reset(request_context_getter_->GetURLRequestContext()->CreateRequest(
-      original_url_, this));
+  request_ = request_context_getter_->GetURLRequestContext()->CreateRequest(
+      original_url_, DEFAULT_PRIORITY, this);
   request_->set_stack_trace(stack_trace_);
   int flags = request_->load_flags() | load_flags_;
   if (!g_interception_enabled)
diff --git a/net/url_request/url_request.cc b/net/url_request/url_request.cc
index 57e9fb8..dae9d0e 100644
--- a/net/url_request/url_request.cc
+++ b/net/url_request/url_request.cc
@@ -200,8 +200,8 @@ void URLRequest::Delegate::OnSSLCertificateError(URLRequest* request,
 ///////////////////////////////////////////////////////////////////////////////
 // URLRequest
 
-// TODO(shalev): Get rid of this constructor in favour of the one below it.
 URLRequest::URLRequest(const GURL& url,
+                       RequestPriority priority,
                        Delegate* delegate,
                        const URLRequestContext* context)
     : context_(context),
@@ -216,44 +216,7 @@ URLRequest::URLRequest(const GURL& url,
       is_pending_(false),
       is_redirecting_(false),
       redirect_limit_(kMaxRedirects),
-      priority_(DEFAULT_PRIORITY),
-      identifier_(GenerateURLRequestIdentifier()),
-      calling_delegate_(false),
-      delegate_info_usage_(DELEGATE_INFO_DEBUG_ONLY),
-      before_request_callback_(base::Bind(&URLRequest::BeforeRequestComplete,
-                                          base::Unretained(this))),
-      has_notified_completion_(false),
-      received_response_content_length_(0),
-      creation_time_(base::TimeTicks::Now()) {
-  SIMPLE_STATS_COUNTER("URLRequestCount");
-
-  // Sanity check out environment.
-  DCHECK(base::MessageLoop::current())
-      << "The current base::MessageLoop must exist";
-
-  CHECK(context);
-  context->url_requests()->insert(this);
-
-  net_log_.BeginEvent(NetLog::TYPE_REQUEST_ALIVE);
-}
-
-URLRequest::URLRequest(const GURL& url,
-                       Delegate* delegate,
-                       const URLRequestContext* context,
-                       NetworkDelegate* network_delegate)
-    : context_(context),
-      network_delegate_(network_delegate),
-      net_log_(BoundNetLog::Make(context->net_log(),
-                                 NetLog::SOURCE_URL_REQUEST)),
-      url_chain_(1, url),
-      method_("GET"),
-      referrer_policy_(CLEAR_REFERRER_ON_TRANSITION_FROM_SECURE_TO_INSECURE),
-      load_flags_(LOAD_NORMAL),
-      delegate_(delegate),
-      is_pending_(false),
-      is_redirecting_(false),
-      redirect_limit_(kMaxRedirects),
-      priority_(DEFAULT_PRIORITY),
+      priority_(priority),
       identifier_(GenerateURLRequestIdentifier()),
       calling_delegate_(false),
       delegate_info_usage_(DELEGATE_INFO_DEBUG_ONLY),
diff --git a/net/url_request/url_request.h b/net/url_request/url_request.h
index 1145f63..e35e9fa 100644
--- a/net/url_request/url_request.h
+++ b/net/url_request/url_request.h
@@ -308,17 +308,11 @@ class NET_EXPORT URLRequest : NON_EXPORTED_BASE(public base::NonThreadSafe),
     virtual ~Delegate() {}
   };
 
-  // TODO(shalev): Get rid of this constructor in favour of the one below it.
-  // Initialize an URL request.
   URLRequest(const GURL& url,
+             RequestPriority priority,
              Delegate* delegate,
              const URLRequestContext* context);
 
-  URLRequest(const GURL& url,
-             Delegate* delegate,
-             const URLRequestContext* context,
-             NetworkDelegate* network_delegate);
-
   // If destroyed after Start() has been called but while IO is pending,
   // then the request will be effectively canceled and the delegate
   // will not have any more of its methods called.
diff --git a/net/url_request/url_request_context.cc b/net/url_request/url_request_context.cc
index 45ac83f..b5c5313 100644
--- a/net/url_request/url_request_context.cc
+++ b/net/url_request/url_request_context.cc
@@ -68,9 +68,11 @@ const HttpNetworkSession::Params* URLRequestContext::GetNetworkSessionParams(
   return &network_session->params();
 }
 
-URLRequest* URLRequestContext::CreateRequest(
-    const GURL& url, URLRequest::Delegate* delegate) const {
-  return new URLRequest(url, delegate, this, network_delegate_);
+scoped_ptr<URLRequest> URLRequestContext::CreateRequest(
+    const GURL& url,
+    RequestPriority priority,
+    URLRequest::Delegate* delegate) const {
+  return scoped_ptr<URLRequest>(new URLRequest(url, priority, delegate, this));
 }
 
 void URLRequestContext::set_cookie_store(CookieStore* cookie_store) {
diff --git a/net/url_request/url_request_context.h b/net/url_request/url_request_context.h
index bf9921e..b23646f 100644
--- a/net/url_request/url_request_context.h
+++ b/net/url_request/url_request_context.h
@@ -19,6 +19,7 @@
 #include "base/threading/non_thread_safe.h"
 #include "net/base/net_export.h"
 #include "net/base/net_log.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_network_session.h"
 #include "net/http/http_server_properties.h"
 #include "net/http/transport_security_state.h"
@@ -56,8 +57,9 @@ class NET_EXPORT URLRequestContext
   // May return NULL if this context doesn't have an associated network session.
   const HttpNetworkSession::Params* GetNetworkSessionParams() const;
 
-  URLRequest* CreateRequest(
-      const GURL& url, URLRequest::Delegate* delegate) const;
+  scoped_ptr<URLRequest> CreateRequest(const GURL& url,
+                                       RequestPriority priority,
+                                       URLRequest::Delegate* delegate) const;
 
   NetLog* net_log() const {
     return net_log_;
diff --git a/net/url_request/url_request_context_builder_unittest.cc b/net/url_request/url_request_context_builder_unittest.cc
index f747b4d..e882253 100644
--- a/net/url_request/url_request_context_builder_unittest.cc
+++ b/net/url_request/url_request_context_builder_unittest.cc
@@ -5,6 +5,7 @@
 #include "net/url_request/url_request_context_builder.h"
 
 #include "build/build_config.h"
+#include "net/base/request_priority.h"
 #include "net/test/spawned_test_server/spawned_test_server.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_test_util.h"
@@ -55,8 +56,10 @@ TEST_F(URLRequestContextBuilderTest, DefaultSettings) {
 
   scoped_ptr<URLRequestContext> context(builder_.Build());
   TestDelegate delegate;
-  URLRequest request(
-      test_server_.GetURL("echoheader?Foo"), &delegate, context.get());
+  URLRequest request(test_server_.GetURL("echoheader?Foo"),
+                     DEFAULT_PRIORITY,
+                     &delegate,
+                     context.get());
   request.set_method("GET");
   request.SetExtraRequestHeaderByName("Foo", "Bar", false);
   request.Start();
@@ -70,8 +73,10 @@ TEST_F(URLRequestContextBuilderTest, UserAgent) {
   builder_.set_user_agent("Bar");
   scoped_ptr<URLRequestContext> context(builder_.Build());
   TestDelegate delegate;
-  URLRequest request(
-      test_server_.GetURL("echoheader?User-Agent"), &delegate, context.get());
+  URLRequest request(test_server_.GetURL("echoheader?User-Agent"),
+                     DEFAULT_PRIORITY,
+                     &delegate,
+                     context.get());
   request.set_method("GET");
   request.Start();
   base::MessageLoop::current()->Run();
diff --git a/net/url_request/url_request_filter_unittest.cc b/net/url_request/url_request_filter_unittest.cc
index 3a41466..2e024a2 100644
--- a/net/url_request/url_request_filter_unittest.cc
+++ b/net/url_request/url_request_filter_unittest.cc
@@ -5,6 +5,7 @@
 #include "net/url_request/url_request_filter.h"
 
 #include "base/memory/scoped_ptr.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_job.h"
@@ -53,10 +54,12 @@ TEST(URLRequestFilter, BasicMatching) {
   TestURLRequestContext request_context;
 
   GURL url_1("http://foo.com/");
-  TestURLRequest request_1(url_1, &delegate, &request_context, NULL);
+  TestURLRequest request_1(
+      url_1, DEFAULT_PRIORITY, &delegate, &request_context);
 
   GURL url_2("http://bar.com/");
-  TestURLRequest request_2(url_2, &delegate, &request_context, NULL);
+  TestURLRequest request_2(
+      url_2, DEFAULT_PRIORITY, &delegate, &request_context);
 
   // Check AddUrlHandler checks for invalid URLs.
   EXPECT_FALSE(URLRequestFilter::GetInstance()->AddUrlHandler(GURL(),
diff --git a/net/url_request/url_request_ftp_job_unittest.cc b/net/url_request/url_request_ftp_job_unittest.cc
index f9eafab..4bc6675 100644
--- a/net/url_request/url_request_ftp_job_unittest.cc
+++ b/net/url_request/url_request_ftp_job_unittest.cc
@@ -7,6 +7,7 @@
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_vector.h"
 #include "base/run_loop.h"
+#include "net/base/request_priority.h"
 #include "net/ftp/ftp_auth_cache.h"
 #include "net/http/http_transaction_unittest.h"
 #include "net/proxy/mock_proxy_resolver.h"
@@ -121,7 +122,10 @@ class URLRequestFtpJobPriorityTest : public testing::Test {
  protected:
   URLRequestFtpJobPriorityTest()
       : proxy_service_(new SimpleProxyConfigService, NULL, NULL),
-        req_(GURL("ftp://ftp.example.com"), &delegate_, &context_, NULL) {
+        req_(GURL("ftp://ftp.example.com"),
+             DEFAULT_PRIORITY,
+             &delegate_,
+             &context_) {
     context_.set_proxy_service(&proxy_service_);
     context_.set_http_transaction_factory(&network_layer_);
   }
@@ -262,9 +266,9 @@ TEST_F(URLRequestFtpJobTest, FtpProxyRequest) {
 
   TestDelegate request_delegate;
   URLRequest url_request(GURL("ftp://ftp.example.com/"),
+                         DEFAULT_PRIORITY,
                          &request_delegate,
-                         request_context(),
-                         network_delegate());
+                         request_context());
   url_request.Start();
   ASSERT_TRUE(url_request.is_pending());
   socket_data(0)->RunFor(4);
@@ -287,9 +291,9 @@ TEST_F(URLRequestFtpJobTest, FtpProxyRequestOrphanJob) {
 
   TestDelegate request_delegate;
   URLRequest url_request(GURL("ftp://ftp.example.com/"),
+                         DEFAULT_PRIORITY,
                          &request_delegate,
-                         request_context(),
-                         network_delegate());
+                         request_context());
   url_request.Start();
 
   // Now |url_request| will be deleted before its completion,
@@ -315,9 +319,9 @@ TEST_F(URLRequestFtpJobTest, FtpProxyRequestNeedProxyAuthNoCredentials) {
 
   TestDelegate request_delegate;
   URLRequest url_request(GURL("ftp://ftp.example.com/"),
+                         DEFAULT_PRIORITY,
                          &request_delegate,
-                         request_context(),
-                         network_delegate());
+                         request_context());
   url_request.Start();
   ASSERT_TRUE(url_request.is_pending());
   socket_data(0)->RunFor(5);
@@ -359,9 +363,9 @@ TEST_F(URLRequestFtpJobTest, FtpProxyRequestNeedProxyAuthWithCredentials) {
   request_delegate.set_credentials(
       AuthCredentials(ASCIIToUTF16("myuser"), ASCIIToUTF16("mypass")));
   URLRequest url_request(GURL("ftp://ftp.example.com/"),
+                         DEFAULT_PRIORITY,
                          &request_delegate,
-                         request_context(),
-                         network_delegate());
+                         request_context());
   url_request.Start();
   ASSERT_TRUE(url_request.is_pending());
   socket_data(0)->RunFor(9);
@@ -392,9 +396,9 @@ TEST_F(URLRequestFtpJobTest, FtpProxyRequestNeedServerAuthNoCredentials) {
 
   TestDelegate request_delegate;
   URLRequest url_request(GURL("ftp://ftp.example.com/"),
+                         DEFAULT_PRIORITY,
                          &request_delegate,
-                         request_context(),
-                         network_delegate());
+                         request_context());
   url_request.Start();
   ASSERT_TRUE(url_request.is_pending());
   socket_data(0)->RunFor(5);
@@ -436,9 +440,9 @@ TEST_F(URLRequestFtpJobTest, FtpProxyRequestNeedServerAuthWithCredentials) {
   request_delegate.set_credentials(
       AuthCredentials(ASCIIToUTF16("myuser"), ASCIIToUTF16("mypass")));
   URLRequest url_request(GURL("ftp://ftp.example.com/"),
+                         DEFAULT_PRIORITY,
                          &request_delegate,
-                         request_context(),
-                         network_delegate());
+                         request_context());
   url_request.Start();
   ASSERT_TRUE(url_request.is_pending());
   socket_data(0)->RunFor(9);
@@ -501,10 +505,8 @@ TEST_F(URLRequestFtpJobTest, FtpProxyRequestNeedProxyAndServerAuth) {
   TestDelegate request_delegate;
   request_delegate.set_credentials(
       AuthCredentials(ASCIIToUTF16("proxyuser"), ASCIIToUTF16("proxypass")));
-  URLRequest url_request(url,
-                         &request_delegate,
-                         request_context(),
-                         network_delegate());
+  URLRequest url_request(
+      url, DEFAULT_PRIORITY, &request_delegate, request_context());
   url_request.Start();
   ASSERT_TRUE(url_request.is_pending());
   socket_data(0)->RunFor(5);
@@ -537,9 +539,9 @@ TEST_F(URLRequestFtpJobTest, FtpProxyRequestDoNotSaveCookies) {
 
   TestDelegate request_delegate;
   URLRequest url_request(GURL("ftp://ftp.example.com/"),
+                         DEFAULT_PRIORITY,
                          &request_delegate,
-                         request_context(),
-                         network_delegate());
+                         request_context());
   url_request.Start();
   ASSERT_TRUE(url_request.is_pending());
 
@@ -571,9 +573,9 @@ TEST_F(URLRequestFtpJobTest, FtpProxyRequestDoNotFollowRedirects) {
 
   TestDelegate request_delegate;
   URLRequest url_request(GURL("ftp://ftp.example.com/"),
+                         DEFAULT_PRIORITY,
                          &request_delegate,
-                         request_context(),
-                         network_delegate());
+                         request_context());
   url_request.Start();
   EXPECT_TRUE(url_request.is_pending());
 
@@ -615,9 +617,9 @@ TEST_F(URLRequestFtpJobTest, FtpProxyRequestReuseSocket) {
 
   TestDelegate request_delegate1;
   URLRequest url_request1(GURL("ftp://ftp.example.com/first"),
+                          DEFAULT_PRIORITY,
                           &request_delegate1,
-                          request_context(),
-                          network_delegate());
+                          request_context());
   url_request1.Start();
   ASSERT_TRUE(url_request1.is_pending());
   socket_data(0)->RunFor(4);
@@ -630,9 +632,9 @@ TEST_F(URLRequestFtpJobTest, FtpProxyRequestReuseSocket) {
 
   TestDelegate request_delegate2;
   URLRequest url_request2(GURL("ftp://ftp.example.com/second"),
+                          DEFAULT_PRIORITY,
                           &request_delegate2,
-                          request_context(),
-                          network_delegate());
+                          request_context());
   url_request2.Start();
   ASSERT_TRUE(url_request2.is_pending());
   socket_data(0)->RunFor(4);
@@ -676,9 +678,9 @@ TEST_F(URLRequestFtpJobTest, FtpProxyRequestDoNotReuseSocket) {
 
   TestDelegate request_delegate1;
   URLRequest url_request1(GURL("ftp://ftp.example.com/first"),
+                          DEFAULT_PRIORITY,
                           &request_delegate1,
-                          request_context(),
-                          network_delegate());
+                          request_context());
   url_request1.Start();
   ASSERT_TRUE(url_request1.is_pending());
   socket_data(0)->RunFor(4);
@@ -691,9 +693,9 @@ TEST_F(URLRequestFtpJobTest, FtpProxyRequestDoNotReuseSocket) {
 
   TestDelegate request_delegate2;
   URLRequest url_request2(GURL("http://ftp.example.com/second"),
+                          DEFAULT_PRIORITY,
                           &request_delegate2,
-                          request_context(),
-                          network_delegate());
+                          request_context());
   url_request2.Start();
   ASSERT_TRUE(url_request2.is_pending());
   socket_data(1)->RunFor(4);
diff --git a/net/url_request/url_request_http_job_unittest.cc b/net/url_request/url_request_http_job_unittest.cc
index ce72054..50d3391 100644
--- a/net/url_request/url_request_http_job_unittest.cc
+++ b/net/url_request/url_request_http_job_unittest.cc
@@ -9,6 +9,7 @@
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "net/base/auth.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_transaction_factory.h"
 #include "net/http/http_transaction_unittest.h"
 #include "net/url_request/url_request_status.h"
@@ -40,7 +41,10 @@ class TestURLRequestHttpJob : public URLRequestHttpJob {
 class URLRequestHttpJobTest : public ::testing::Test {
  protected:
   URLRequestHttpJobTest()
-      : req_(GURL("http://www.example.com"), &delegate_, &context_, NULL) {
+      : req_(GURL("http://www.example.com"),
+             DEFAULT_PRIORITY,
+             &delegate_,
+             &context_) {
     context_.set_http_transaction_factory(&network_layer_);
   }
 
diff --git a/net/url_request/url_request_job_factory_impl_unittest.cc b/net/url_request/url_request_job_factory_impl_unittest.cc
index 078e16a..93ca0f8 100644
--- a/net/url_request/url_request_job_factory_impl_unittest.cc
+++ b/net/url_request/url_request_job_factory_impl_unittest.cc
@@ -6,6 +6,7 @@
 
 #include "base/bind.h"
 #include "base/memory/weak_ptr.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_job.h"
 #include "net/url_request/url_request_test_util.h"
@@ -59,7 +60,8 @@ class DummyProtocolHandler : public URLRequestJobFactory::ProtocolHandler {
 TEST(URLRequestJobFactoryTest, NoProtocolHandler) {
   TestDelegate delegate;
   TestURLRequestContext request_context;
-  TestURLRequest request(GURL("foo://bar"), &delegate, &request_context, NULL);
+  TestURLRequest request(
+      GURL("foo://bar"), DEFAULT_PRIORITY, &delegate, &request_context);
   request.Start();
 
   base::MessageLoop::current()->Run();
@@ -73,7 +75,8 @@ TEST(URLRequestJobFactoryTest, BasicProtocolHandler) {
   TestURLRequestContext request_context;
   request_context.set_job_factory(&job_factory);
   job_factory.SetProtocolHandler("foo", new DummyProtocolHandler);
-  TestURLRequest request(GURL("foo://bar"), &delegate, &request_context, NULL);
+  TestURLRequest request(
+      GURL("foo://bar"), DEFAULT_PRIORITY, &delegate, &request_context);
   request.Start();
 
   base::MessageLoop::current()->Run();
diff --git a/net/url_request/url_request_job_unittest.cc b/net/url_request/url_request_job_unittest.cc
index 5f63b09..99f4314 100644
--- a/net/url_request/url_request_job_unittest.cc
+++ b/net/url_request/url_request_job_unittest.cc
@@ -4,66 +4,71 @@
 
 #include "net/url_request/url_request_job.h"
 
+#include "net/base/request_priority.h"
 #include "net/http/http_transaction_unittest.h"
 #include "net/url_request/url_request_test_util.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+namespace net {
+
 namespace {
 
 // This is a header that signals the end of the data.
 const char kGzipGata[] = "\x1f\x08b\x08\0\0\0\0\0\0\3\3\0\0\0\0\0\0\0\0";
 
-void GZipServer(const net::HttpRequestInfo* request,
-                std::string* response_status, std::string* response_headers,
+void GZipServer(const HttpRequestInfo* request,
+                std::string* response_status,
+                std::string* response_headers,
                 std::string* response_data) {
   response_data->assign(kGzipGata, sizeof(kGzipGata));
 }
 
 const MockTransaction kGZip_Transaction = {
-  "http://www.google.com/gzyp",
-  "GET",
-  base::Time(),
-  "",
-  net::LOAD_NORMAL,
-  "HTTP/1.1 200 OK",
-  "Cache-Control: max-age=10000\n"
-  "Content-Encoding: gzip\n"
-  "Content-Length: 30\n",  // Intentionally wrong.
-  base::Time(),
-  "",
-  TEST_MODE_NORMAL,
-  &GZipServer,
-  0,
-  net::OK
+    "http://www.google.com/gzyp",
+    "GET",
+    base::Time(),
+    "",
+    LOAD_NORMAL,
+    "HTTP/1.1 200 OK",
+    "Cache-Control: max-age=10000\n"
+    "Content-Encoding: gzip\n"
+    "Content-Length: 30\n",  // Intentionally wrong.
+    base::Time(),
+    "",
+    TEST_MODE_NORMAL,
+    &GZipServer,
+    0,
+    OK
 };
 
 const MockTransaction kRedirect_Transaction = {
-  "http://www.google.com/redirect",
-  "GET",
-  base::Time(),
-  "",
-  net::LOAD_NORMAL,
-  "HTTP/1.1 302 Found",
-  "Cache-Control: max-age=10000\n"
-  "Location: http://www.google.com/destination\n"
-  "Content-Length: 5\n",
-  base::Time(),
-  "hello",
-  TEST_MODE_NORMAL,
-  NULL,
-  0,
-  net::OK
+    "http://www.google.com/redirect",
+    "GET",
+    base::Time(),
+    "",
+    LOAD_NORMAL,
+    "HTTP/1.1 302 Found",
+    "Cache-Control: max-age=10000\n"
+    "Location: http://www.google.com/destination\n"
+    "Content-Length: 5\n",
+    base::Time(),
+    "hello",
+    TEST_MODE_NORMAL,
+    NULL,
+    0,
+    OK
 };
 
 }  // namespace
 
 TEST(URLRequestJob, TransactionNotifiedWhenDone) {
   MockNetworkLayer network_layer;
-  net::TestURLRequestContext context;
+  TestURLRequestContext context;
   context.set_http_transaction_factory(&network_layer);
 
-  net::TestDelegate d;
-  net::TestURLRequest req(GURL(kGZip_Transaction.url), &d, &context, NULL);
+  TestDelegate d;
+  TestURLRequest req(
+      GURL(kGZip_Transaction.url), DEFAULT_PRIORITY, &d, &context);
   AddMockTransaction(&kGZip_Transaction);
 
   req.set_method("GET");
@@ -78,11 +83,12 @@ TEST(URLRequestJob, TransactionNotifiedWhenDone) {
 
 TEST(URLRequestJob, SyncTransactionNotifiedWhenDone) {
   MockNetworkLayer network_layer;
-  net::TestURLRequestContext context;
+  TestURLRequestContext context;
   context.set_http_transaction_factory(&network_layer);
 
-  net::TestDelegate d;
-  net::TestURLRequest req(GURL(kGZip_Transaction.url), &d, &context, NULL);
+  TestDelegate d;
+  TestURLRequest req(
+      GURL(kGZip_Transaction.url), DEFAULT_PRIORITY, &d, &context);
   MockTransaction transaction(kGZip_Transaction);
   transaction.test_mode = TEST_MODE_SYNC_ALL;
   AddMockTransaction(&transaction);
@@ -99,11 +105,12 @@ TEST(URLRequestJob, SyncTransactionNotifiedWhenDone) {
 
 TEST(URLRequestJob, RedirectTransactionNotifiedWhenDone) {
   MockNetworkLayer network_layer;
-  net::TestURLRequestContext context;
+  TestURLRequestContext context;
   context.set_http_transaction_factory(&network_layer);
 
-  net::TestDelegate d;
-  net::TestURLRequest req(GURL(kRedirect_Transaction.url), &d, &context, NULL);
+  TestDelegate d;
+  TestURLRequest req(
+      GURL(kRedirect_Transaction.url), DEFAULT_PRIORITY, &d, &context);
   AddMockTransaction(&kRedirect_Transaction);
 
   req.set_method("GET");
@@ -115,3 +122,5 @@ TEST(URLRequestJob, RedirectTransactionNotifiedWhenDone) {
 
   RemoveMockTransaction(&kRedirect_Transaction);
 }
+
+}  // namespace net
diff --git a/net/url_request/url_request_test_util.cc b/net/url_request/url_request_test_util.cc
index 8b209f9..9f9abcd 100644
--- a/net/url_request/url_request_test_util.cc
+++ b/net/url_request/url_request_test_util.cc
@@ -127,11 +127,10 @@ void TestURLRequestContext::Init() {
 }
 
 TestURLRequest::TestURLRequest(const GURL& url,
+                               RequestPriority priority,
                                Delegate* delegate,
-                               TestURLRequestContext* context,
-                               NetworkDelegate* network_delegate)
-    : URLRequest(url, delegate, context, network_delegate) {
-}
+                               TestURLRequestContext* context)
+    : URLRequest(url, priority, delegate, context) {}
 
 TestURLRequest::~TestURLRequest() {
 }
diff --git a/net/url_request/url_request_test_util.h b/net/url_request/url_request_test_util.h
index 796b913..c0dc1a0 100644
--- a/net/url_request/url_request_test_util.h
+++ b/net/url_request/url_request_test_util.h
@@ -23,6 +23,7 @@
 #include "net/base/load_timing_info.h"
 #include "net/base/net_errors.h"
 #include "net/base/network_delegate.h"
+#include "net/base/request_priority.h"
 #include "net/cert/cert_verifier.h"
 #include "net/cookies/cookie_monster.h"
 #include "net/disk_cache/disk_cache.h"
@@ -107,9 +108,10 @@ class TestURLRequestContextGetter : public URLRequestContextGetter {
 
 class TestURLRequest : public URLRequest {
  public:
-  TestURLRequest(
-      const GURL& url, Delegate* delegate,
-      TestURLRequestContext* context, NetworkDelegate* network_delegate);
+  TestURLRequest(const GURL& url,
+                 RequestPriority priority,
+                 Delegate* delegate,
+                 TestURLRequestContext* context);
   virtual ~TestURLRequest();
 };
 
diff --git a/net/url_request/url_request_throttler_simulation_unittest.cc b/net/url_request/url_request_throttler_simulation_unittest.cc
index 059c80f..c68f59a 100644
--- a/net/url_request/url_request_throttler_simulation_unittest.cc
+++ b/net/url_request/url_request_throttler_simulation_unittest.cc
@@ -20,6 +20,7 @@
 #include "base/memory/scoped_vector.h"
 #include "base/rand_util.h"
 #include "base/time/time.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request_test_util.h"
 #include "net/url_request/url_request_throttler_manager.h"
 #include "net/url_request/url_request_throttler_test_support.h"
@@ -116,16 +117,14 @@ class DiscreteTimeSimulation {
 // after all |Requester| objects.
 class Server : public DiscreteTimeSimulation::Actor {
  public:
-  Server(int max_queries_per_tick,
-         double request_drop_ratio)
+  Server(int max_queries_per_tick, double request_drop_ratio)
       : max_queries_per_tick_(max_queries_per_tick),
         request_drop_ratio_(request_drop_ratio),
         num_overloaded_ticks_remaining_(0),
         num_current_tick_queries_(0),
         num_overloaded_ticks_(0),
         max_experienced_queries_per_tick_(0),
-        mock_request_(GURL(), NULL, &context_, NULL) {
-  }
+        mock_request_(GURL(), DEFAULT_PRIORITY, NULL, &context_) {}
 
   void SetDowntime(const TimeTicks& start_time, const TimeDelta& duration) {
     start_downtime_ = start_time;
diff --git a/net/url_request/url_request_throttler_unittest.cc b/net/url_request/url_request_throttler_unittest.cc
index e47da30..c291a67 100644
--- a/net/url_request/url_request_throttler_unittest.cc
+++ b/net/url_request/url_request_throttler_unittest.cc
@@ -14,6 +14,7 @@
 #include "base/strings/stringprintf.h"
 #include "base/time/time.h"
 #include "net/base/load_flags.h"
+#include "net/base/request_priority.h"
 #include "net/base/test_completion_callback.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_test_util.h"
@@ -172,8 +173,8 @@ struct GurlAndString {
 
 class URLRequestThrottlerEntryTest : public testing::Test {
  protected:
-  URLRequestThrottlerEntryTest() : request_(GURL(), NULL, &context_, NULL) {
-  }
+  URLRequestThrottlerEntryTest()
+      : request_(GURL(), DEFAULT_PRIORITY, NULL, &context_) {}
 
   virtual void SetUp();
   virtual void TearDown();
@@ -391,8 +392,7 @@ TEST_F(URLRequestThrottlerEntryTest, ExplicitUserRequest) {
 class URLRequestThrottlerManagerTest : public testing::Test {
  protected:
   URLRequestThrottlerManagerTest()
-      : request_(GURL(), NULL, &context_, NULL) {
-  }
+      : request_(GURL(), DEFAULT_PRIORITY, NULL, &context_) {}
 
   virtual void SetUp() {
     request_.set_load_flags(0);
diff --git a/net/url_request/url_request_unittest.cc b/net/url_request/url_request_unittest.cc
index 08aa1b15..daf4c57 100644
--- a/net/url_request/url_request_unittest.cc
+++ b/net/url_request/url_request_unittest.cc
@@ -37,6 +37,7 @@
 #include "net/base/net_log_unittest.h"
 #include "net/base/net_module.h"
 #include "net/base/net_util.h"
+#include "net/base/request_priority.h"
 #include "net/base/test_data_directory.h"
 #include "net/base/upload_bytes_element_reader.h"
 #include "net/base/upload_data_stream.h"
@@ -621,7 +622,7 @@ class URLRequestTest : public PlatformTest {
 TEST_F(URLRequestTest, AboutBlankTest) {
   TestDelegate d;
   {
-    URLRequest r(GURL("about:blank"), &d, &default_context_);
+    URLRequest r(GURL("about:blank"), DEFAULT_PRIORITY, &d, &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -643,7 +644,8 @@ TEST_F(URLRequestTest, DataURLImageTest) {
   TestDelegate d;
   {
     // Use our nice little Chrome logo.
-    URLRequest r(GURL(
+    URLRequest r(
+        GURL(
         "data:image/png;base64,"
         "iVBORw0KGgoAAAANSUhEUgAAABAAAAAQCAYAAAAf8/9hAAADVklEQVQ4jX2TfUwUBBjG3"
         "w1y+HGcd9dxhXR8T4awOccJGgOSWclHImznLkTlSw0DDQXkrmgYgbUYnlQTqQxIEVxitD"
@@ -663,6 +665,7 @@ TEST_F(URLRequestTest, DataURLImageTest) {
         "nlm2O34uI4b9tflqp1+QEFGzoW/ulmcofcpkZCYJhDfSpme7QcrHa+Xfji8paEQkTkSfm"
         "moRWRNZr/F1KfVMjW+IKEnv2FwZfKdzt0BQR6lClcZR0EfEXEfv/G6W9iLiIyCoReV5En"
         "hORIBHx+ufPj/gLB/zGI/G4Bk0AAAAASUVORK5CYII="),
+        DEFAULT_PRIORITY,
         &d,
         &default_context_);
 
@@ -689,7 +692,7 @@ TEST_F(URLRequestTest, FileTest) {
 
   TestDelegate d;
   {
-    URLRequest r(app_url, &d, &default_context_);
+    URLRequest r(app_url, DEFAULT_PRIORITY, &d, &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -718,7 +721,7 @@ TEST_F(URLRequestTest, FileTestCancel) {
 
   TestDelegate d;
   {
-    URLRequest r(app_url, &d, &default_context_);
+    URLRequest r(app_url, DEFAULT_PRIORITY, &d, &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -750,7 +753,7 @@ TEST_F(URLRequestTest, FileTestFullSpecifiedRange) {
 
   TestDelegate d;
   {
-    URLRequest r(temp_url, &d, &default_context_);
+    URLRequest r(temp_url, DEFAULT_PRIORITY, &d, &default_context_);
 
     HttpRequestHeaders headers;
     headers.SetHeader(HttpRequestHeaders::kRange,
@@ -794,7 +797,7 @@ TEST_F(URLRequestTest, FileTestHalfSpecifiedRange) {
 
   TestDelegate d;
   {
-    URLRequest r(temp_url, &d, &default_context_);
+    URLRequest r(temp_url, DEFAULT_PRIORITY, &d, &default_context_);
 
     HttpRequestHeaders headers;
     headers.SetHeader(HttpRequestHeaders::kRange,
@@ -831,7 +834,7 @@ TEST_F(URLRequestTest, FileTestMultipleRanges) {
 
   TestDelegate d;
   {
-    URLRequest r(temp_url, &d, &default_context_);
+    URLRequest r(temp_url, DEFAULT_PRIORITY, &d, &default_context_);
 
     HttpRequestHeaders headers;
     headers.SetHeader(HttpRequestHeaders::kRange,
@@ -850,7 +853,7 @@ TEST_F(URLRequestTest, FileTestMultipleRanges) {
 TEST_F(URLRequestTest, InvalidUrlTest) {
   TestDelegate d;
   {
-    URLRequest r(GURL("invalid url"), &d, &default_context_);
+    URLRequest r(GURL("invalid url"), DEFAULT_PRIORITY, &d, &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -887,7 +890,9 @@ TEST_F(URLRequestTest, ResolveShortcutTest) {
 
   TestDelegate d;
   {
-    URLRequest r(FilePathToFileURL(base::FilePath(lnk_path)), &d,
+    URLRequest r(FilePathToFileURL(base::FilePath(lnk_path)),
+                 DEFAULT_PRIORITY,
+                 &d,
                  &default_context_);
 
     r.Start();
@@ -931,7 +936,8 @@ TEST_F(URLRequestTest, FileDirCancelTest) {
     file_path = file_path.Append(FILE_PATH_LITERAL("net"));
     file_path = file_path.Append(FILE_PATH_LITERAL("data"));
 
-    URLRequest req(FilePathToFileURL(file_path), &d, &default_context_);
+    URLRequest req(
+        FilePathToFileURL(file_path), DEFAULT_PRIORITY, &d, &default_context_);
     req.Start();
     EXPECT_TRUE(req.is_pending());
 
@@ -957,7 +963,8 @@ TEST_F(URLRequestTest, FileDirOutputSanity) {
   path = path.Append(FILE_PATH_LITERAL("url_request_unittest"));
 
   TestDelegate d;
-  URLRequest req(FilePathToFileURL(path), &d, &default_context_);
+  URLRequest req(
+      FilePathToFileURL(path), DEFAULT_PRIORITY, &d, &default_context_);
   req.Start();
   base::RunLoop().Run();
 
@@ -993,7 +1000,8 @@ TEST_F(URLRequestTest, FileDirRedirectNoCrash) {
   path = path.Append(FILE_PATH_LITERAL("url_request_unittest"));
 
   TestDelegate d;
-  URLRequest req(FilePathToFileURL(path), &d, &default_context_);
+  URLRequest req(
+      FilePathToFileURL(path), DEFAULT_PRIORITY, &d, &default_context_);
   req.Start();
   base::RunLoop().Run();
 
@@ -1007,7 +1015,7 @@ TEST_F(URLRequestTest, FileDirRedirectNoCrash) {
 // Don't accept the url "file:///" on windows. See http://crbug.com/1474.
 TEST_F(URLRequestTest, FileDirRedirectSingleSlash) {
   TestDelegate d;
-  URLRequest req(GURL("file:///"), &d, &default_context_);
+  URLRequest req(GURL("file:///"), DEFAULT_PRIORITY, &d, &default_context_);
   req.Start();
   base::RunLoop().Run();
 
@@ -1228,7 +1236,10 @@ TEST_F(URLRequestTest, Intercept) {
   interceptor.main_data_ = TestInterceptor::ok_data();
 
   TestDelegate d;
-  URLRequest req(GURL("http://test_intercept/foo"), &d, &default_context_);
+  URLRequest req(GURL("http://test_intercept/foo"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   base::SupportsUserData::Data* user_data0 = new base::SupportsUserData::Data();
   base::SupportsUserData::Data* user_data1 = new base::SupportsUserData::Data();
   base::SupportsUserData::Data* user_data2 = new base::SupportsUserData::Data();
@@ -1269,7 +1280,10 @@ TEST_F(URLRequestTest, InterceptRedirect) {
   interceptor.redirect_data_ = TestInterceptor::ok_data();
 
   TestDelegate d;
-  URLRequest req(GURL("http://test_intercept/foo"), &d, &default_context_);
+  URLRequest req(GURL("http://test_intercept/foo"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.set_method("GET");
   req.Start();
   base::RunLoop().Run();
@@ -1302,7 +1316,10 @@ TEST_F(URLRequestTest, InterceptServerError) {
   interceptor.final_data_ = TestInterceptor::ok_data();
 
   TestDelegate d;
-  URLRequest req(GURL("http://test_intercept/foo"), &d, &default_context_);
+  URLRequest req(GURL("http://test_intercept/foo"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.set_method("GET");
   req.Start();
   base::RunLoop().Run();
@@ -1331,7 +1348,10 @@ TEST_F(URLRequestTest, InterceptNetworkError) {
   interceptor.final_data_ = TestInterceptor::ok_data();
 
   TestDelegate d;
-  URLRequest req(GURL("http://test_intercept/foo"), &d, &default_context_);
+  URLRequest req(GURL("http://test_intercept/foo"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.set_method("GET");
   req.Start();
   base::RunLoop().Run();
@@ -1360,7 +1380,10 @@ TEST_F(URLRequestTest, InterceptRestartRequired) {
   interceptor.main_data_ = TestInterceptor::ok_data();
 
   TestDelegate d;
-  URLRequest req(GURL("http://test_intercept/foo"), &d, &default_context_);
+  URLRequest req(GURL("http://test_intercept/foo"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.set_method("GET");
   req.Start();
   base::RunLoop().Run();
@@ -1391,7 +1414,10 @@ TEST_F(URLRequestTest, InterceptRespectsCancelMain) {
   interceptor.final_data_ = TestInterceptor::ok_data();
 
   TestDelegate d;
-  URLRequest req(GURL("http://test_intercept/foo"), &d, &default_context_);
+  URLRequest req(GURL("http://test_intercept/foo"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.set_method("GET");
   req.Start();
   base::RunLoop().Run();
@@ -1422,7 +1448,10 @@ TEST_F(URLRequestTest, InterceptRespectsCancelRedirect) {
   interceptor.final_data_ = TestInterceptor::ok_data();
 
   TestDelegate d;
-  URLRequest req(GURL("http://test_intercept/foo"), &d, &default_context_);
+  URLRequest req(GURL("http://test_intercept/foo"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.set_method("GET");
   req.Start();
   base::RunLoop().Run();
@@ -1447,7 +1476,10 @@ TEST_F(URLRequestTest, InterceptRespectsCancelFinal) {
   interceptor.cancel_final_request_ = true;
 
   TestDelegate d;
-  URLRequest req(GURL("http://test_intercept/foo"), &d, &default_context_);
+  URLRequest req(GURL("http://test_intercept/foo"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.set_method("GET");
   req.Start();
   base::RunLoop().Run();
@@ -1473,7 +1505,10 @@ TEST_F(URLRequestTest, InterceptRespectsCancelInRestart) {
   interceptor.final_data_ = TestInterceptor::ok_data();
 
   TestDelegate d;
-  URLRequest req(GURL("http://test_intercept/foo"), &d, &default_context_);
+  URLRequest req(GURL("http://test_intercept/foo"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.set_method("GET");
   req.Start();
   base::RunLoop().Run();
@@ -1493,7 +1528,8 @@ LoadTimingInfo RunLoadTimingTest(const LoadTimingInfo& job_load_timing,
   interceptor.intercept_main_request_ = true;
   interceptor.main_request_load_timing_info_ = job_load_timing;
   TestDelegate d;
-  URLRequest req(GURL("http://test_intercept/foo"), &d, context);
+  URLRequest req(
+      GURL("http://test_intercept/foo"), DEFAULT_PRIORITY, &d, context);
   req.Start();
   base::RunLoop().Run();
 
@@ -1567,8 +1603,8 @@ TEST_F(URLRequestTest, InterceptLoadTiming) {
   LoadTimingInfo job_load_timing =
       NormalLoadTimingInfo(now, CONNECT_TIMING_HAS_DNS_TIMES, false);
 
-  LoadTimingInfo load_timing_result = RunLoadTimingTest(job_load_timing,
-                                                        &default_context_);
+  LoadTimingInfo load_timing_result =
+      RunLoadTimingTest(job_load_timing, &default_context_);
 
   // Nothing should have been changed by the URLRequest.
   EXPECT_EQ(job_load_timing.proxy_resolve_start,
@@ -1598,8 +1634,8 @@ TEST_F(URLRequestTest, InterceptLoadTimingProxy) {
   LoadTimingInfo job_load_timing =
       NormalLoadTimingInfo(now, CONNECT_TIMING_HAS_SSL_TIMES, true);
 
-  LoadTimingInfo load_timing_result = RunLoadTimingTest(job_load_timing,
-                                                        &default_context_);
+  LoadTimingInfo load_timing_result =
+      RunLoadTimingTest(job_load_timing, &default_context_);
 
   // Nothing should have been changed by the URLRequest.
   EXPECT_EQ(job_load_timing.proxy_resolve_start,
@@ -1643,8 +1679,8 @@ TEST_F(URLRequestTest, InterceptLoadTimingEarlyProxyResolution) {
   job_load_timing.connect_timing.connect_end =
       now - base::TimeDelta::FromDays(1);
 
-  LoadTimingInfo load_timing_result = RunLoadTimingTest(job_load_timing,
-                                                        &default_context_);
+  LoadTimingInfo load_timing_result =
+      RunLoadTimingTest(job_load_timing, &default_context_);
 
   // Proxy times, connect times, and DNS times should all be replaced with
   // request_start.
@@ -1673,8 +1709,8 @@ TEST_F(URLRequestTest, InterceptLoadTimingEarlyProxyResolutionReused) {
   job_load_timing.proxy_resolve_start = now - base::TimeDelta::FromDays(4);
   job_load_timing.proxy_resolve_end = now - base::TimeDelta::FromDays(3);
 
-  LoadTimingInfo load_timing_result = RunLoadTimingTest(job_load_timing,
-                                                        &default_context_);
+  LoadTimingInfo load_timing_result =
+      RunLoadTimingTest(job_load_timing, &default_context_);
 
   // Proxy times and connect times should all be replaced with request_start.
   EXPECT_EQ(load_timing_result.request_start,
@@ -1702,8 +1738,8 @@ TEST_F(URLRequestTest, InterceptLoadTimingEarlyConnect) {
   job_load_timing.connect_timing.connect_end =
       now - base::TimeDelta::FromDays(4);
 
-  LoadTimingInfo load_timing_result = RunLoadTimingTest(job_load_timing,
-                                                        &default_context_);
+  LoadTimingInfo load_timing_result =
+      RunLoadTimingTest(job_load_timing, &default_context_);
 
   // Connect times, and SSL times should be replaced with request_start.
   EXPECT_EQ(load_timing_result.request_start,
@@ -1734,8 +1770,8 @@ TEST_F(URLRequestTest, InterceptLoadTimingEarlyConnectWithProxy) {
   job_load_timing.connect_timing.connect_end =
       now - base::TimeDelta::FromDays(2);
 
-  LoadTimingInfo load_timing_result = RunLoadTimingTest(job_load_timing,
-                                                        &default_context_);
+  LoadTimingInfo load_timing_result =
+      RunLoadTimingTest(job_load_timing, &default_context_);
 
   // Connect times should be replaced with proxy_resolve_end.
   EXPECT_EQ(load_timing_result.proxy_resolve_end,
@@ -1752,8 +1788,10 @@ TEST_F(URLRequestTest, InterceptLoadTimingEarlyConnectWithProxy) {
 TEST_F(URLRequestTest, Identifiers) {
   TestDelegate d;
   TestURLRequestContext context;
-  TestURLRequest req(GURL("http://example.com"), &d, &context, NULL);
-  TestURLRequest other_req(GURL("http://example.com"), &d, &context, NULL);
+  TestURLRequest req(
+      GURL("http://example.com"), DEFAULT_PRIORITY, &d, &context);
+  TestURLRequest other_req(
+      GURL("http://example.com"), DEFAULT_PRIORITY, &d, &context);
 
   ASSERT_NE(req.identifier(), other_req.identifier());
 }
@@ -1768,7 +1806,7 @@ TEST_F(URLRequestTest, NetworkDelegateProxyError) {
   TestURLRequestContextWithProxy context("myproxy:70", &network_delegate);
 
   TestDelegate d;
-  URLRequest req(GURL("http://example.com"), &d, &context);
+  URLRequest req(GURL("http://example.com"), DEFAULT_PRIORITY, &d, &context);
   req.set_method("GET");
 
   req.Start();
@@ -1788,7 +1826,7 @@ TEST_F(URLRequestTest, NetworkDelegateProxyError) {
 // content is empty.
 TEST_F(URLRequestTest, RequestCompletionForEmptyResponse) {
   TestDelegate d;
-  URLRequest req(GURL("data:,"), &d, &default_context_);
+  URLRequest req(GURL("data:,"), DEFAULT_PRIORITY, &d, &default_context_);
   req.Start();
   base::RunLoop().Run();
   EXPECT_EQ("", d.data_received());
@@ -1799,7 +1837,10 @@ TEST_F(URLRequestTest, RequestCompletionForEmptyResponse) {
 // correctly, both before and after start.
 TEST_F(URLRequestTest, SetPriorityBasic) {
   TestDelegate d;
-  URLRequest req(GURL("http://test_intercept/foo"), &d, &default_context_);
+  URLRequest req(GURL("http://test_intercept/foo"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   EXPECT_EQ(DEFAULT_PRIORITY, req.priority());
 
   req.SetPriority(LOW);
@@ -1816,7 +1857,10 @@ TEST_F(URLRequestTest, SetPriorityBasic) {
 // Start on it.
 TEST_F(URLRequestTest, SetJobPriorityBeforeJobStart) {
   TestDelegate d;
-  URLRequest req(GURL("http://test_intercept/foo"), &d, &default_context_);
+  URLRequest req(GURL("http://test_intercept/foo"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   EXPECT_EQ(DEFAULT_PRIORITY, req.priority());
 
   scoped_refptr<URLRequestTestJob> job =
@@ -1834,7 +1878,10 @@ TEST_F(URLRequestTest, SetJobPriorityBeforeJobStart) {
 // job.
 TEST_F(URLRequestTest, SetJobPriority) {
   TestDelegate d;
-  URLRequest req(GURL("http://test_intercept/foo"), &d, &default_context_);
+  URLRequest req(GURL("http://test_intercept/foo"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
   scoped_refptr<URLRequestTestJob> job =
       new URLRequestTestJob(&req, &default_network_delegate_);
@@ -1881,8 +1928,10 @@ TEST_F(URLRequestTest, DelayedCookieCallback) {
     TestNetworkDelegate network_delegate;
     context.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(
-        test_server.GetURL("set-cookie?CookieToNotSend=1"), &d, &context);
+    URLRequest req(test_server.GetURL("set-cookie?CookieToNotSend=1"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &context);
     req.Start();
     base::RunLoop().Run();
     EXPECT_EQ(0, network_delegate.blocked_get_cookies_count());
@@ -1895,7 +1944,10 @@ TEST_F(URLRequestTest, DelayedCookieCallback) {
     TestNetworkDelegate network_delegate;
     context.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(test_server.GetURL("echoheader?Cookie"), &d, &context);
+    URLRequest req(test_server.GetURL("echoheader?Cookie"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &context);
     req.Start();
     base::RunLoop().Run();
 
@@ -1916,6 +1968,7 @@ TEST_F(URLRequestTest, DoNotSendCookies) {
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
     URLRequest req(test_server.GetURL("set-cookie?CookieToNotSend=1"),
+                   DEFAULT_PRIORITY,
                    &d,
                    &default_context_);
     req.Start();
@@ -1929,8 +1982,10 @@ TEST_F(URLRequestTest, DoNotSendCookies) {
     TestNetworkDelegate network_delegate;
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(
-        test_server.GetURL("echoheader?Cookie"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("echoheader?Cookie"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.Start();
     base::RunLoop().Run();
 
@@ -1945,8 +2000,10 @@ TEST_F(URLRequestTest, DoNotSendCookies) {
     TestNetworkDelegate network_delegate;
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(
-        test_server.GetURL("echoheader?Cookie"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("echoheader?Cookie"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.set_load_flags(LOAD_DO_NOT_SEND_COOKIES);
     req.Start();
     base::RunLoop().Run();
@@ -1970,6 +2027,7 @@ TEST_F(URLRequestTest, DoNotSaveCookies) {
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
     URLRequest req(test_server.GetURL("set-cookie?CookieToNotUpdate=2"),
+                   DEFAULT_PRIORITY,
                    &d,
                    &default_context_);
     req.Start();
@@ -1987,6 +2045,7 @@ TEST_F(URLRequestTest, DoNotSaveCookies) {
     TestDelegate d;
     URLRequest req(
         test_server.GetURL("set-cookie?CookieToNotSave=1&CookieToNotUpdate=1"),
+        DEFAULT_PRIORITY,
         &d,
         &default_context_);
     req.set_load_flags(LOAD_DO_NOT_SAVE_COOKIES);
@@ -2005,8 +2064,10 @@ TEST_F(URLRequestTest, DoNotSaveCookies) {
     TestNetworkDelegate network_delegate;
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(
-        test_server.GetURL("echoheader?Cookie"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("echoheader?Cookie"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.Start();
     base::RunLoop().Run();
 
@@ -2031,6 +2092,7 @@ TEST_F(URLRequestTest, DoNotSendCookies_ViaPolicy) {
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
     URLRequest req(test_server.GetURL("set-cookie?CookieToNotSend=1"),
+                   DEFAULT_PRIORITY,
                    &d,
                    &default_context_);
     req.Start();
@@ -2045,8 +2107,10 @@ TEST_F(URLRequestTest, DoNotSendCookies_ViaPolicy) {
     TestNetworkDelegate network_delegate;
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(
-        test_server.GetURL("echoheader?Cookie"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("echoheader?Cookie"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.Start();
     base::RunLoop().Run();
 
@@ -2063,8 +2127,10 @@ TEST_F(URLRequestTest, DoNotSendCookies_ViaPolicy) {
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
     network_delegate.set_cookie_options(TestNetworkDelegate::NO_GET_COOKIES);
-    URLRequest req(
-        test_server.GetURL("echoheader?Cookie"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("echoheader?Cookie"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.Start();
     base::RunLoop().Run();
 
@@ -2086,6 +2152,7 @@ TEST_F(URLRequestTest, DoNotSaveCookies_ViaPolicy) {
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
     URLRequest req(test_server.GetURL("set-cookie?CookieToNotUpdate=2"),
+                   DEFAULT_PRIORITY,
                    &d,
                    &default_context_);
     req.Start();
@@ -2103,6 +2170,7 @@ TEST_F(URLRequestTest, DoNotSaveCookies_ViaPolicy) {
     network_delegate.set_cookie_options(TestNetworkDelegate::NO_SET_COOKIE);
     URLRequest req(
         test_server.GetURL("set-cookie?CookieToNotSave=1&CookieToNotUpdate=1"),
+        DEFAULT_PRIORITY,
         &d,
         &default_context_);
     req.Start();
@@ -2118,8 +2186,10 @@ TEST_F(URLRequestTest, DoNotSaveCookies_ViaPolicy) {
     TestNetworkDelegate network_delegate;
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(
-        test_server.GetURL("echoheader?Cookie"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("echoheader?Cookie"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.Start();
     base::RunLoop().Run();
 
@@ -2142,7 +2212,10 @@ TEST_F(URLRequestTest, DoNotSaveEmptyCookies) {
     TestNetworkDelegate network_delegate;
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(test_server.GetURL("set-cookie"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("set-cookie"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.Start();
     base::RunLoop().Run();
 
@@ -2162,6 +2235,7 @@ TEST_F(URLRequestTest, DoNotSendCookies_ViaPolicy_Async) {
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
     URLRequest req(test_server.GetURL("set-cookie?CookieToNotSend=1"),
+                   DEFAULT_PRIORITY,
                    &d,
                    &default_context_);
     req.Start();
@@ -2176,8 +2250,10 @@ TEST_F(URLRequestTest, DoNotSendCookies_ViaPolicy_Async) {
     TestNetworkDelegate network_delegate;
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(
-        test_server.GetURL("echoheader?Cookie"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("echoheader?Cookie"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.Start();
     base::RunLoop().Run();
 
@@ -2194,8 +2270,10 @@ TEST_F(URLRequestTest, DoNotSendCookies_ViaPolicy_Async) {
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
     network_delegate.set_cookie_options(TestNetworkDelegate::NO_GET_COOKIES);
-    URLRequest req(
-        test_server.GetURL("echoheader?Cookie"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("echoheader?Cookie"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.Start();
     base::RunLoop().Run();
 
@@ -2217,6 +2295,7 @@ TEST_F(URLRequestTest, DoNotSaveCookies_ViaPolicy_Async) {
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
     URLRequest req(test_server.GetURL("set-cookie?CookieToNotUpdate=2"),
+                   DEFAULT_PRIORITY,
                    &d,
                    &default_context_);
     req.Start();
@@ -2234,6 +2313,7 @@ TEST_F(URLRequestTest, DoNotSaveCookies_ViaPolicy_Async) {
     network_delegate.set_cookie_options(TestNetworkDelegate::NO_SET_COOKIE);
     URLRequest req(
         test_server.GetURL("set-cookie?CookieToNotSave=1&CookieToNotUpdate=1"),
+        DEFAULT_PRIORITY,
         &d,
         &default_context_);
     req.Start();
@@ -2249,8 +2329,10 @@ TEST_F(URLRequestTest, DoNotSaveCookies_ViaPolicy_Async) {
     TestNetworkDelegate network_delegate;
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(
-        test_server.GetURL("echoheader?Cookie"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("echoheader?Cookie"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.Start();
     base::RunLoop().Run();
 
@@ -2316,8 +2398,10 @@ TEST_F(URLRequestTest, AcceptClockSkewCookieWithWrongDateTimezone) {
     TestNetworkDelegate network_delegate;
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(test_server.GetURL(
-        "set-cookie?StillGood=1;expires=Mon,18-Apr-1977,22:50:13,GMT"),
+    URLRequest req(
+        test_server.GetURL(
+            "set-cookie?StillGood=1;expires=Mon,18-Apr-1977,22:50:13,GMT"),
+        DEFAULT_PRIORITY,
         &d,
         &default_context_);
     req.Start();
@@ -2328,8 +2412,10 @@ TEST_F(URLRequestTest, AcceptClockSkewCookieWithWrongDateTimezone) {
     TestNetworkDelegate network_delegate;
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(
-        test_server.GetURL("echoheader?Cookie"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("echoheader?Cookie"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.Start();
     base::RunLoop().Run();
 
@@ -2340,8 +2426,10 @@ TEST_F(URLRequestTest, AcceptClockSkewCookieWithWrongDateTimezone) {
     FixedDateNetworkDelegate network_delegate("18-Apr-1977 22:49:13 UTC");
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(test_server.GetURL(
-        "set-cookie?StillGood=1;expires=Mon,18-Apr-1977,22:50:13,GMT"),
+    URLRequest req(
+        test_server.GetURL(
+            "set-cookie?StillGood=1;expires=Mon,18-Apr-1977,22:50:13,GMT"),
+        DEFAULT_PRIORITY,
         &d,
         &default_context_);
     req.Start();
@@ -2352,8 +2440,10 @@ TEST_F(URLRequestTest, AcceptClockSkewCookieWithWrongDateTimezone) {
     TestNetworkDelegate network_delegate;
     default_context_.set_network_delegate(&network_delegate);
     TestDelegate d;
-    URLRequest req(
-        test_server.GetURL("echoheader?Cookie"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("echoheader?Cookie"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.Start();
     base::RunLoop().Run();
 
@@ -2372,8 +2462,10 @@ TEST_F(URLRequestTest, DoNotOverrideReferrer) {
   // only the latter shall be respected.
   {
     TestDelegate d;
-    URLRequest req(
-        test_server.GetURL("echoheader?Referer"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("echoheader?Referer"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.SetReferrer("http://foo.com/");
 
     HttpRequestHeaders headers;
@@ -2390,8 +2482,10 @@ TEST_F(URLRequestTest, DoNotOverrideReferrer) {
   // shall be sent in the header.
   {
     TestDelegate d;
-    URLRequest req(
-        test_server.GetURL("echoheader?Referer"), &d, &default_context_);
+    URLRequest req(test_server.GetURL("echoheader?Referer"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
 
     HttpRequestHeaders headers;
     headers.SetHeader(HttpRequestHeaders::kReferer, "http://bar.com/");
@@ -2426,7 +2520,7 @@ class URLRequestTestHTTP : public URLRequestTest {
                               bool include_data) {
     static const char kData[] = "hello world";
     TestDelegate d;
-    URLRequest req(redirect_url, &d, &default_context_);
+    URLRequest req(redirect_url, DEFAULT_PRIORITY, &d, &default_context_);
     req.set_method(request_method);
     if (include_data) {
       req.set_upload(make_scoped_ptr(CreateSimpleUploadData(kData)));
@@ -2471,7 +2565,8 @@ class URLRequestTestHTTP : public URLRequestTest {
 
     for (int i = 0; i < kIterations; ++i) {
       TestDelegate d;
-      URLRequest r(test_server_.GetURL("echo"), &d, &default_context_);
+      URLRequest r(
+          test_server_.GetURL("echo"), DEFAULT_PRIORITY, &d, &default_context_);
       r.set_method(method.c_str());
 
       r.set_upload(make_scoped_ptr(CreateSimpleUploadData(uploadBytes)));
@@ -2519,8 +2614,9 @@ class URLRequestTestHTTP : public URLRequestTest {
     TestDelegate d;
     URLRequest r(test_server_.GetURL("set-many-cookies?" +
                                      base::IntToString(num_cookies)),
-                                     &d,
-                                     &default_context_);
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -2555,12 +2651,12 @@ TEST_F(URLRequestTestHTTP, ProxyTunnelRedirectTest) {
 
   TestNetworkDelegate network_delegate;  // Must outlive URLRequest.
   TestURLRequestContextWithProxy context(
-      test_server_.host_port_pair().ToString(),
-      &network_delegate);
+      test_server_.host_port_pair().ToString(), &network_delegate);
 
   TestDelegate d;
   {
-    URLRequest r(GURL("https://www.redirect.com/"), &d, &context);
+    URLRequest r(
+        GURL("https://www.redirect.com/"), DEFAULT_PRIORITY, &d, &context);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
@@ -2581,12 +2677,12 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateTunnelConnectionFailed) {
 
   TestNetworkDelegate network_delegate;  // Must outlive URLRequest.
   TestURLRequestContextWithProxy context(
-      test_server_.host_port_pair().ToString(),
-      &network_delegate);
+      test_server_.host_port_pair().ToString(), &network_delegate);
 
   TestDelegate d;
   {
-    URLRequest r(GURL("https://www.redirect.com/"), &d, &context);
+    URLRequest r(
+        GURL("https://www.redirect.com/"), DEFAULT_PRIORITY, &d, &context);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
@@ -2627,7 +2723,8 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateBlockAsynchronously) {
   context.Init();
 
   {
-    URLRequest r(test_server_.GetURL("empty.html"), &d, &context);
+    URLRequest r(
+        test_server_.GetURL("empty.html"), DEFAULT_PRIORITY, &d, &context);
 
     r.Start();
     for (size_t i = 0; i < blocking_stages_length; ++i) {
@@ -2656,11 +2753,11 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateCancelRequest) {
   network_delegate.set_retval(ERR_EMPTY_RESPONSE);
 
   TestURLRequestContextWithProxy context(
-      test_server_.host_port_pair().ToString(),
-      &network_delegate);
+      test_server_.host_port_pair().ToString(), &network_delegate);
 
   {
-    URLRequest r(test_server_.GetURL(std::string()), &d, &context);
+    URLRequest r(
+        test_server_.GetURL(std::string()), DEFAULT_PRIORITY, &d, &context);
 
     r.Start();
     base::RunLoop().Run();
@@ -2690,7 +2787,7 @@ void NetworkDelegateCancelRequest(BlockingNetworkDelegate::BlockMode block_mode,
   context.Init();
 
   {
-    URLRequest r(url, &d, &context);
+    URLRequest r(url, DEFAULT_PRIORITY, &d, &context);
 
     r.Start();
     base::RunLoop().Run();
@@ -2762,12 +2859,11 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateRedirectRequest) {
   network_delegate.set_redirect_url(redirect_url);
 
   TestURLRequestContextWithProxy context(
-      test_server_.host_port_pair().ToString(),
-      &network_delegate);
+      test_server_.host_port_pair().ToString(), &network_delegate);
 
   {
     GURL original_url(test_server_.GetURL("empty.html"));
-    URLRequest r(original_url, &d, &context);
+    URLRequest r(original_url, DEFAULT_PRIORITY, &d, &context);
 
     r.Start();
     base::RunLoop().Run();
@@ -2795,12 +2891,11 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateRedirectRequestSynchronously) {
   network_delegate.set_redirect_url(redirect_url);
 
   TestURLRequestContextWithProxy context(
-      test_server_.host_port_pair().ToString(),
-      &network_delegate);
+      test_server_.host_port_pair().ToString(), &network_delegate);
 
   {
     GURL original_url(test_server_.GetURL("empty.html"));
-    URLRequest r(original_url, &d, &context);
+    URLRequest r(original_url, DEFAULT_PRIORITY, &d, &context);
 
     r.Start();
     base::RunLoop().Run();
@@ -2835,7 +2930,7 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateRedirectRequestPost) {
 
   {
     GURL original_url(test_server_.GetURL("empty.html"));
-    URLRequest r(original_url, &d, &context);
+    URLRequest r(original_url, DEFAULT_PRIORITY, &d, &context);
     r.set_method("POST");
     r.set_upload(make_scoped_ptr(CreateSimpleUploadData(kData)));
     HttpRequestHeaders headers;
@@ -2877,7 +2972,7 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateOnAuthRequiredSyncNoAction) {
 
   {
     GURL url(test_server_.GetURL("auth-basic"));
-    URLRequest r(url, &d, &context);
+    URLRequest r(url, DEFAULT_PRIORITY, &d, &context);
     r.Start();
 
     base::RunLoop().Run();
@@ -2908,7 +3003,7 @@ TEST_F(URLRequestTestHTTP,
 
   {
     GURL url(test_server_.GetURL("auth-basic"));
-    URLRequest r(url, &d, &context);
+    URLRequest r(url, DEFAULT_PRIORITY, &d, &context);
     r.Start();
 
     {
@@ -2949,7 +3044,7 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateOnAuthRequiredSyncSetAuth) {
 
   {
     GURL url(test_server_.GetURL("auth-basic"));
-    URLRequest r(url, &d, &context);
+    URLRequest r(url, DEFAULT_PRIORITY, &d, &context);
     r.Start();
     base::RunLoop().Run();
 
@@ -2984,7 +3079,7 @@ TEST_F(URLRequestTestHTTP,
 
   {
     GURL url(test_server_.GetURL("auth-basic"));
-    URLRequest r(url, &d, &context);
+    URLRequest r(url, DEFAULT_PRIORITY, &d, &context);
     r.Start();
     base::RunLoop().Run();
 
@@ -3022,7 +3117,7 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateOnAuthRequiredSyncCancel) {
 
   {
     GURL url(test_server_.GetURL("auth-basic"));
-    URLRequest r(url, &d, &context);
+    URLRequest r(url, DEFAULT_PRIORITY, &d, &context);
     r.Start();
     base::RunLoop().Run();
 
@@ -3056,7 +3151,7 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateOnAuthRequiredAsyncNoAction) {
 
   {
     GURL url(test_server_.GetURL("auth-basic"));
-    URLRequest r(url, &d, &context);
+    URLRequest r(url, DEFAULT_PRIORITY, &d, &context);
     r.Start();
     base::RunLoop().Run();
 
@@ -3091,7 +3186,7 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateOnAuthRequiredAsyncSetAuth) {
 
   {
     GURL url(test_server_.GetURL("auth-basic"));
-    URLRequest r(url, &d, &context);
+    URLRequest r(url, DEFAULT_PRIORITY, &d, &context);
     r.Start();
     base::RunLoop().Run();
 
@@ -3124,7 +3219,7 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateOnAuthRequiredAsyncCancel) {
 
   {
     GURL url(test_server_.GetURL("auth-basic"));
-    URLRequest r(url, &d, &context);
+    URLRequest r(url, DEFAULT_PRIORITY, &d, &context);
     r.Start();
     base::RunLoop().Run();
 
@@ -3154,7 +3249,8 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateCancelWhileWaiting1) {
   context.Init();
 
   {
-    URLRequest r(test_server_.GetURL(std::string()), &d, &context);
+    URLRequest r(
+        test_server_.GetURL(std::string()), DEFAULT_PRIORITY, &d, &context);
 
     r.Start();
     base::RunLoop().Run();
@@ -3190,7 +3286,8 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateCancelWhileWaiting2) {
   context.Init();
 
   {
-    URLRequest r(test_server_.GetURL(std::string()), &d, &context);
+    URLRequest r(
+        test_server_.GetURL(std::string()), DEFAULT_PRIORITY, &d, &context);
 
     r.Start();
     base::RunLoop().Run();
@@ -3225,7 +3322,8 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateCancelWhileWaiting3) {
   context.Init();
 
   {
-    URLRequest r(test_server_.GetURL(std::string()), &d, &context);
+    URLRequest r(
+        test_server_.GetURL(std::string()), DEFAULT_PRIORITY, &d, &context);
 
     r.Start();
     base::RunLoop().Run();
@@ -3260,7 +3358,8 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateCancelWhileWaiting4) {
   context.Init();
 
   {
-    URLRequest r(test_server_.GetURL("auth-basic"), &d, &context);
+    URLRequest r(
+        test_server_.GetURL("auth-basic"), DEFAULT_PRIORITY, &d, &context);
 
     r.Start();
     base::RunLoop().Run();
@@ -3287,12 +3386,12 @@ TEST_F(URLRequestTestHTTP, UnexpectedServerAuthTest) {
 
   TestNetworkDelegate network_delegate;  // Must outlive URLRequest.
   TestURLRequestContextWithProxy context(
-      test_server_.host_port_pair().ToString(),
-      &network_delegate);
+      test_server_.host_port_pair().ToString(), &network_delegate);
 
   TestDelegate d;
   {
-    URLRequest r(GURL("https://www.server-auth.com/"), &d, &context);
+    URLRequest r(
+        GURL("https://www.server-auth.com/"), DEFAULT_PRIORITY, &d, &context);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -3309,7 +3408,10 @@ TEST_F(URLRequestTestHTTP, GetTest_NoCache) {
 
   TestDelegate d;
   {
-    URLRequest r(test_server_.GetURL(std::string()), &d, &default_context_);
+    URLRequest r(test_server_.GetURL(std::string()),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -3375,7 +3477,10 @@ TEST_F(URLRequestTestHTTP, GetTest) {
 
   TestDelegate d;
   {
-    URLRequest r(test_server_.GetURL(std::string()), &d, &default_context_);
+    URLRequest r(test_server_.GetURL(std::string()),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -3398,7 +3503,7 @@ TEST_F(URLRequestTestHTTP, GetTest_GetFullRequestHeaders) {
   TestDelegate d;
   {
     GURL test_url(test_server_.GetURL(std::string()));
-    URLRequest r(test_url, &d, &default_context_);
+    URLRequest r(test_url, DEFAULT_PRIORITY, &d, &default_context_);
 
     HttpRequestHeaders headers;
     EXPECT_FALSE(r.GetFullRequestHeaders(&headers));
@@ -3426,7 +3531,10 @@ TEST_F(URLRequestTestHTTP, GetTestLoadTiming) {
 
   TestDelegate d;
   {
-    URLRequest r(test_server_.GetURL(std::string()), &d, &default_context_);
+    URLRequest r(test_server_.GetURL(std::string()),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -3476,7 +3584,8 @@ TEST_F(URLRequestTestHTTP, GetZippedTest) {
       context.set_network_delegate(&network_delegate);
       context.Init();
 
-      URLRequest r(test_server_.GetURL(test_file), &d, &context);
+      URLRequest r(
+          test_server_.GetURL(test_file), DEFAULT_PRIORITY, &d, &context);
       r.Start();
       EXPECT_TRUE(r.is_pending());
 
@@ -3512,8 +3621,11 @@ TEST_F(URLRequestTestHTTP, HTTPSToHTTPRedirectNoRefererTest) {
   // server should not be sent the referer.
   GURL http_destination = test_server_.GetURL(std::string());
   TestDelegate d;
-  URLRequest req(https_test_server.GetURL(
-      "server-redirect?" + http_destination.spec()), &d, &default_context_);
+  URLRequest req(
+      https_test_server.GetURL("server-redirect?" + http_destination.spec()),
+      DEFAULT_PRIORITY,
+      &d,
+      &default_context_);
   req.SetReferrer("https://www.referrer.com/");
   req.Start();
   base::RunLoop().Run();
@@ -3531,7 +3643,7 @@ TEST_F(URLRequestTestHTTP, RedirectLoadTiming) {
   GURL original_url =
       test_server_.GetURL("server-redirect?" + destination_url.spec());
   TestDelegate d;
-  URLRequest req(original_url, &d, &default_context_);
+  URLRequest req(original_url, DEFAULT_PRIORITY, &d, &default_context_);
   req.Start();
   base::RunLoop().Run();
 
@@ -3571,7 +3683,7 @@ TEST_F(URLRequestTestHTTP, MultipleRedirectTest) {
   GURL original_url = test_server_.GetURL(
       "server-redirect?" + middle_redirect_url.spec());
   TestDelegate d;
-  URLRequest req(original_url, &d, &default_context_);
+  URLRequest req(original_url, DEFAULT_PRIORITY, &d, &default_context_);
   req.Start();
   base::RunLoop().Run();
 
@@ -3887,7 +3999,9 @@ TEST_F(URLRequestTestHTTP, DelegateInfoBeforeStart) {
 
   {
     URLRequest r(test_server_.GetURL("empty.html"),
-                 &request_delegate, &context);
+                 DEFAULT_PRIORITY,
+                 &request_delegate,
+                 &context);
     LoadStateWithParam load_state = r.GetLoadState();
     EXPECT_EQ(LOAD_STATE_IDLE, load_state.state);
     EXPECT_EQ(string16(), load_state.param);
@@ -3933,7 +4047,9 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateInfo) {
 
   {
     URLRequest r(test_server_.GetURL("simple.html"),
-                 &request_delegate, &context);
+                 DEFAULT_PRIORITY,
+                 &request_delegate,
+                 &context);
     LoadStateWithParam load_state = r.GetLoadState();
     EXPECT_EQ(LOAD_STATE_IDLE, load_state.state);
     EXPECT_EQ(string16(), load_state.param);
@@ -3984,7 +4100,9 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateInfoRedirect) {
 
   {
     URLRequest r(test_server_.GetURL("server-redirect?simple.html"),
-                 &request_delegate, &context);
+                 DEFAULT_PRIORITY,
+                 &request_delegate,
+                 &context);
     LoadStateWithParam load_state = r.GetLoadState();
     EXPECT_EQ(LOAD_STATE_IDLE, load_state.state);
     EXPECT_EQ(string16(), load_state.param);
@@ -4060,7 +4178,9 @@ TEST_F(URLRequestTestHTTP, NetworkDelegateInfoAuth) {
 
   {
     URLRequest r(test_server_.GetURL("auth-basic"),
-                 &request_delegate, &context);
+                 DEFAULT_PRIORITY,
+                 &request_delegate,
+                 &context);
     LoadStateWithParam load_state = r.GetLoadState();
     EXPECT_EQ(LOAD_STATE_IDLE, load_state.state);
     EXPECT_EQ(string16(), load_state.param);
@@ -4118,7 +4238,9 @@ TEST_F(URLRequestTestHTTP, URLRequestDelegateInfo) {
     // the possability of multiple reads being combined in the unlikely event
     // that it occurs.
     URLRequest r(test_server_.GetURL("chunked?waitBetweenChunks=20"),
-                 &request_delegate, &context);
+                 DEFAULT_PRIORITY,
+                 &request_delegate,
+                 &context);
     LoadStateWithParam load_state = r.GetLoadState();
     r.Start();
     base::RunLoop().Run();
@@ -4166,7 +4288,9 @@ TEST_F(URLRequestTestHTTP, URLRequestDelegateInfoOnRedirect) {
 
   {
     URLRequest r(test_server_.GetURL("server-redirect?simple.html"),
-                 &request_delegate, &context);
+                 DEFAULT_PRIORITY,
+                 &request_delegate,
+                 &context);
     LoadStateWithParam load_state = r.GetLoadState();
     r.Start();
     base::RunLoop().Run();
@@ -4224,7 +4348,9 @@ TEST_F(URLRequestTestHTTP, URLRequestDelegateOnRedirectCancelled) {
 
     {
       URLRequest r(test_server_.GetURL("server-redirect?simple.html"),
-                   &request_delegate, &context);
+                   DEFAULT_PRIORITY,
+                   &request_delegate,
+                   &context);
       LoadStateWithParam load_state = r.GetLoadState();
       r.Start();
       base::RunLoop().Run();
@@ -4285,7 +4411,7 @@ TEST_F(URLRequestTestHTTP, RedirectWithAdditionalHeadersTest) {
   GURL original_url = test_server_.GetURL(
       "server-redirect?" + destination_url.spec());
   RedirectWithAdditionalHeadersDelegate d;
-  URLRequest req(original_url, &d, &default_context_);
+  URLRequest req(original_url, DEFAULT_PRIORITY, &d, &default_context_);
   req.Start();
   base::RunLoop().Run();
 
@@ -4321,7 +4447,7 @@ TEST_F(URLRequestTestHTTP, RedirectWithHeaderRemovalTest) {
   GURL original_url = test_server_.GetURL(
       "server-redirect?" + destination_url.spec());
   RedirectWithHeaderRemovalDelegate d;
-  URLRequest req(original_url, &d, &default_context_);
+  URLRequest req(original_url, DEFAULT_PRIORITY, &d, &default_context_);
   req.SetExtraRequestHeaderByName(kExtraHeaderToRemove, "dummy", false);
   req.Start();
   base::RunLoop().Run();
@@ -4337,7 +4463,10 @@ TEST_F(URLRequestTestHTTP, RedirectWithHeaderRemovalTest) {
 TEST_F(URLRequestTestHTTP, CancelTest) {
   TestDelegate d;
   {
-    URLRequest r(GURL("http://www.google.com/"), &d, &default_context_);
+    URLRequest r(GURL("http://www.google.com/"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -4359,7 +4488,10 @@ TEST_F(URLRequestTestHTTP, CancelTest2) {
 
   TestDelegate d;
   {
-    URLRequest r(test_server_.GetURL(std::string()), &d, &default_context_);
+    URLRequest r(test_server_.GetURL(std::string()),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
     d.set_cancel_in_response_started(true);
 
@@ -4380,7 +4512,10 @@ TEST_F(URLRequestTestHTTP, CancelTest3) {
 
   TestDelegate d;
   {
-    URLRequest r(test_server_.GetURL(std::string()), &d, &default_context_);
+    URLRequest r(test_server_.GetURL(std::string()),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
     d.set_cancel_in_received_data(true);
 
@@ -4404,7 +4539,10 @@ TEST_F(URLRequestTestHTTP, CancelTest4) {
 
   TestDelegate d;
   {
-    URLRequest r(test_server_.GetURL(std::string()), &d, &default_context_);
+    URLRequest r(test_server_.GetURL(std::string()),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -4430,7 +4568,10 @@ TEST_F(URLRequestTestHTTP, CancelTest5) {
   // populate cache
   {
     TestDelegate d;
-    URLRequest r(test_server_.GetURL("cachetime"), &d, &default_context_);
+    URLRequest r(test_server_.GetURL("cachetime"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
     r.Start();
     base::RunLoop().Run();
     EXPECT_EQ(URLRequestStatus::SUCCESS, r.status().status());
@@ -4439,7 +4580,10 @@ TEST_F(URLRequestTestHTTP, CancelTest5) {
   // cancel read from cache (see bug 990242)
   {
     TestDelegate d;
-    URLRequest r(test_server_.GetURL("cachetime"), &d, &default_context_);
+    URLRequest r(test_server_.GetURL("cachetime"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
     r.Start();
     r.Cancel();
     base::RunLoop().Run();
@@ -4466,7 +4610,8 @@ TEST_F(URLRequestTestHTTP, PostEmptyTest) {
 
   TestDelegate d;
   {
-    URLRequest r(test_server_.GetURL("echo"), &d, &default_context_);
+    URLRequest r(
+        test_server_.GetURL("echo"), DEFAULT_PRIORITY, &d, &default_context_);
     r.set_method("POST");
 
     r.Start();
@@ -4488,7 +4633,8 @@ TEST_F(URLRequestTestHTTP, PostFileTest) {
 
   TestDelegate d;
   {
-    URLRequest r(test_server_.GetURL("echo"), &d, &default_context_);
+    URLRequest r(
+        test_server_.GetURL("echo"), DEFAULT_PRIORITY, &d, &default_context_);
     r.set_method("POST");
 
     base::FilePath dir;
@@ -4548,7 +4694,8 @@ TEST_F(URLRequestTestHTTP, TestPostChunkedDataBeforeStart) {
 
   TestDelegate d;
   {
-    URLRequest r(test_server_.GetURL("echo"), &d, &default_context_);
+    URLRequest r(
+        test_server_.GetURL("echo"), DEFAULT_PRIORITY, &d, &default_context_);
     r.EnableChunkedUpload();
     r.set_method("POST");
     AddChunksToUpload(&r);
@@ -4566,7 +4713,8 @@ TEST_F(URLRequestTestHTTP, TestPostChunkedDataJustAfterStart) {
 
   TestDelegate d;
   {
-    URLRequest r(test_server_.GetURL("echo"), &d, &default_context_);
+    URLRequest r(
+        test_server_.GetURL("echo"), DEFAULT_PRIORITY, &d, &default_context_);
     r.EnableChunkedUpload();
     r.set_method("POST");
     r.Start();
@@ -4583,7 +4731,8 @@ TEST_F(URLRequestTestHTTP, TestPostChunkedDataAfterStart) {
 
   TestDelegate d;
   {
-    URLRequest r(test_server_.GetURL("echo"), &d, &default_context_);
+    URLRequest r(
+        test_server_.GetURL("echo"), DEFAULT_PRIORITY, &d, &default_context_);
     r.EnableChunkedUpload();
     r.set_method("POST");
     r.Start();
@@ -4601,8 +4750,10 @@ TEST_F(URLRequestTestHTTP, ResponseHeadersTest) {
   ASSERT_TRUE(test_server_.Start());
 
   TestDelegate d;
-  URLRequest req(
-      test_server_.GetURL("files/with-headers.html"), &d, &default_context_);
+  URLRequest req(test_server_.GetURL("files/with-headers.html"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.Start();
   base::RunLoop().Run();
 
@@ -4635,10 +4786,10 @@ TEST_F(URLRequestTestHTTP, ProcessSTS) {
   ASSERT_TRUE(https_test_server.Start());
 
   TestDelegate d;
-  URLRequest request(
-      https_test_server.GetURL("files/hsts-headers.html"),
-      &d,
-      &default_context_);
+  URLRequest request(https_test_server.GetURL("files/hsts-headers.html"),
+                     DEFAULT_PRIORITY,
+                     &d,
+                     &default_context_);
   request.Start();
   base::RunLoop().Run();
 
@@ -4679,10 +4830,10 @@ TEST_F(URLRequestTestHTTP, MAYBE_ProcessPKP) {
   ASSERT_TRUE(https_test_server.Start());
 
   TestDelegate d;
-  URLRequest request(
-      https_test_server.GetURL("files/hpkp-headers.html"),
-      &d,
-      &default_context_);
+  URLRequest request(https_test_server.GetURL("files/hpkp-headers.html"),
+                     DEFAULT_PRIORITY,
+                     &d,
+                     &default_context_);
   request.Start();
   base::RunLoop().Run();
 
@@ -4712,6 +4863,7 @@ TEST_F(URLRequestTestHTTP, ProcessSTSOnce) {
   TestDelegate d;
   URLRequest request(
       https_test_server.GetURL("files/hsts-multiple-headers.html"),
+      DEFAULT_PRIORITY,
       &d,
       &default_context_);
   request.Start();
@@ -4741,6 +4893,7 @@ TEST_F(URLRequestTestHTTP, ProcessSTSAndPKP) {
   TestDelegate d;
   URLRequest request(
       https_test_server.GetURL("files/hsts-and-hpkp-headers.html"),
+      DEFAULT_PRIORITY,
       &d,
       &default_context_);
   request.Start();
@@ -4783,6 +4936,7 @@ TEST_F(URLRequestTestHTTP, ProcessSTSAndPKP2) {
   TestDelegate d;
   URLRequest request(
       https_test_server.GetURL("files/hsts-and-hpkp-headers2.html"),
+      DEFAULT_PRIORITY,
       &d,
       &default_context_);
   request.Start();
@@ -4812,8 +4966,10 @@ TEST_F(URLRequestTestHTTP, ContentTypeNormalizationTest) {
   ASSERT_TRUE(test_server_.Start());
 
   TestDelegate d;
-  URLRequest req(test_server_.GetURL(
-      "files/content-type-normalization.html"), &d, &default_context_);
+  URLRequest req(test_server_.GetURL("files/content-type-normalization.html"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.Start();
   base::RunLoop().Run();
 
@@ -4845,8 +5001,10 @@ TEST_F(URLRequestTestHTTP, RestrictFileRedirects) {
   ASSERT_TRUE(test_server_.Start());
 
   TestDelegate d;
-  URLRequest req(test_server_.GetURL(
-      "files/redirect-to-file.html"), &d, &default_context_);
+  URLRequest req(test_server_.GetURL("files/redirect-to-file.html"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.Start();
   base::RunLoop().Run();
 
@@ -4858,8 +5016,10 @@ TEST_F(URLRequestTestHTTP, RestrictDataRedirects) {
   ASSERT_TRUE(test_server_.Start());
 
   TestDelegate d;
-  URLRequest req(test_server_.GetURL(
-      "files/redirect-to-data.html"), &d, &default_context_);
+  URLRequest req(test_server_.GetURL("files/redirect-to-data.html"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.Start();
   base::MessageLoop::current()->Run();
 
@@ -4871,8 +5031,10 @@ TEST_F(URLRequestTestHTTP, RedirectToInvalidURL) {
   ASSERT_TRUE(test_server_.Start());
 
   TestDelegate d;
-  URLRequest req(test_server_.GetURL(
-      "files/redirect-to-invalid-url.html"), &d, &default_context_);
+  URLRequest req(test_server_.GetURL("files/redirect-to-invalid-url.html"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.Start();
   base::RunLoop().Run();
 
@@ -4884,8 +5046,10 @@ TEST_F(URLRequestTestHTTP, NoUserPassInReferrer) {
   ASSERT_TRUE(test_server_.Start());
 
   TestDelegate d;
-  URLRequest req(
-      test_server_.GetURL("echoheader?Referer"), &d, &default_context_);
+  URLRequest req(test_server_.GetURL("echoheader?Referer"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.SetReferrer("http://user:pass@foo.com/");
   req.Start();
   base::RunLoop().Run();
@@ -4897,8 +5061,10 @@ TEST_F(URLRequestTestHTTP, NoFragmentInReferrer) {
   ASSERT_TRUE(test_server_.Start());
 
   TestDelegate d;
-  URLRequest req(
-      test_server_.GetURL("echoheader?Referer"), &d, &default_context_);
+  URLRequest req(test_server_.GetURL("echoheader?Referer"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.SetReferrer("http://foo.com/test#fragment");
   req.Start();
   base::RunLoop().Run();
@@ -4910,8 +5076,10 @@ TEST_F(URLRequestTestHTTP, EmptyReferrerAfterValidReferrer) {
   ASSERT_TRUE(test_server_.Start());
 
   TestDelegate d;
-  URLRequest req(
-      test_server_.GetURL("echoheader?Referer"), &d, &default_context_);
+  URLRequest req(test_server_.GetURL("echoheader?Referer"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.SetReferrer("http://foo.com/test#fragment");
   req.SetReferrer("");
   req.Start();
@@ -4926,8 +5094,10 @@ TEST_F(URLRequestTestHTTP, CancelRedirect) {
   TestDelegate d;
   {
     d.set_cancel_in_received_redirect(true);
-    URLRequest req(
-        test_server_.GetURL("files/redirect-test.html"), &d, &default_context_);
+    URLRequest req(test_server_.GetURL("files/redirect-test.html"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.Start();
     base::RunLoop().Run();
 
@@ -4945,7 +5115,7 @@ TEST_F(URLRequestTestHTTP, DeferredRedirect) {
   {
     d.set_quit_on_redirect(true);
     GURL test_url(test_server_.GetURL("files/redirect-test.html"));
-    URLRequest req(test_url, &d, &default_context_);
+    URLRequest req(test_url, DEFAULT_PRIORITY, &d, &default_context_);
 
     req.Start();
     base::RunLoop().Run();
@@ -4979,7 +5149,7 @@ TEST_F(URLRequestTestHTTP, DeferredRedirect_GetFullRequestHeaders) {
   {
     d.set_quit_on_redirect(true);
     GURL test_url(test_server_.GetURL("files/redirect-test.html"));
-    URLRequest req(test_url, &d, &default_context_);
+    URLRequest req(test_url, DEFAULT_PRIORITY, &d, &default_context_);
 
     EXPECT_FALSE(d.have_full_request_headers());
 
@@ -5020,8 +5190,10 @@ TEST_F(URLRequestTestHTTP, CancelDeferredRedirect) {
   TestDelegate d;
   {
     d.set_quit_on_redirect(true);
-    URLRequest req(
-        test_server_.GetURL("files/redirect-test.html"), &d, &default_context_);
+    URLRequest req(test_server_.GetURL("files/redirect-test.html"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     req.Start();
     base::RunLoop().Run();
 
@@ -5043,8 +5215,10 @@ TEST_F(URLRequestTestHTTP, VaryHeader) {
   // Populate the cache.
   {
     TestDelegate d;
-    URLRequest req(
-        test_server_.GetURL("echoheadercache?foo"), &d, &default_context_);
+    URLRequest req(test_server_.GetURL("echoheadercache?foo"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     HttpRequestHeaders headers;
     headers.SetHeader("foo", "1");
     req.SetExtraRequestHeaders(headers);
@@ -5059,8 +5233,10 @@ TEST_F(URLRequestTestHTTP, VaryHeader) {
   // Expect a cache hit.
   {
     TestDelegate d;
-    URLRequest req(
-        test_server_.GetURL("echoheadercache?foo"), &d, &default_context_);
+    URLRequest req(test_server_.GetURL("echoheadercache?foo"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     HttpRequestHeaders headers;
     headers.SetHeader("foo", "1");
     req.SetExtraRequestHeaders(headers);
@@ -5077,8 +5253,10 @@ TEST_F(URLRequestTestHTTP, VaryHeader) {
   // Expect a cache miss.
   {
     TestDelegate d;
-    URLRequest req(
-        test_server_.GetURL("echoheadercache?foo"), &d, &default_context_);
+    URLRequest req(test_server_.GetURL("echoheadercache?foo"),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
     HttpRequestHeaders headers;
     headers.SetHeader("foo", "2");
     req.SetExtraRequestHeaders(headers);
@@ -5101,7 +5279,10 @@ TEST_F(URLRequestTestHTTP, BasicAuth) {
     TestDelegate d;
     d.set_credentials(AuthCredentials(kUser, kSecret));
 
-    URLRequest r(test_server_.GetURL("auth-basic"), &d, &default_context_);
+    URLRequest r(test_server_.GetURL("auth-basic"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
     r.Start();
 
     base::RunLoop().Run();
@@ -5116,7 +5297,10 @@ TEST_F(URLRequestTestHTTP, BasicAuth) {
     TestDelegate d;
     d.set_credentials(AuthCredentials(kUser, kSecret));
 
-    URLRequest r(test_server_.GetURL("auth-basic"), &d, &default_context_);
+    URLRequest r(test_server_.GetURL("auth-basic"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
     r.set_load_flags(LOAD_VALIDATE_CACHE);
     r.Start();
 
@@ -5148,7 +5332,7 @@ TEST_F(URLRequestTestHTTP, BasicAuthWithCookies) {
     TestDelegate d;
     d.set_credentials(AuthCredentials(kUser, kSecret));
 
-    URLRequest r(url_requiring_auth, &d, &context);
+    URLRequest r(url_requiring_auth, DEFAULT_PRIORITY, &d, &context);
     r.Start();
 
     base::RunLoop().Run();
@@ -5177,7 +5361,7 @@ TEST_F(URLRequestTestHTTP, BasicAuthWithCookies) {
     replacements.SetPasswordStr(password);
     GURL url_with_identity = url_requiring_auth.ReplaceComponents(replacements);
 
-    URLRequest r(url_with_identity, &d, &context);
+    URLRequest r(url_with_identity, DEFAULT_PRIORITY, &d, &context);
     r.Start();
 
     base::RunLoop().Run();
@@ -5199,7 +5383,10 @@ TEST_F(URLRequestTestHTTP, BasicAuthLoadTiming) {
     TestDelegate d;
     d.set_credentials(AuthCredentials(kUser, kSecret));
 
-    URLRequest r(test_server_.GetURL("auth-basic"), &d, &default_context_);
+    URLRequest r(test_server_.GetURL("auth-basic"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
     r.Start();
 
     base::RunLoop().Run();
@@ -5230,7 +5417,10 @@ TEST_F(URLRequestTestHTTP, BasicAuthLoadTiming) {
     TestDelegate d;
     d.set_credentials(AuthCredentials(kUser, kSecret));
 
-    URLRequest r(test_server_.GetURL("auth-basic"), &d, &default_context_);
+    URLRequest r(test_server_.GetURL("auth-basic"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
     r.set_load_flags(LOAD_VALIDATE_CACHE);
     r.Start();
 
@@ -5259,8 +5449,10 @@ TEST_F(URLRequestTestHTTP, Post302RedirectGet) {
   const char kData[] = "hello world";
 
   TestDelegate d;
-  URLRequest req(
-      test_server_.GetURL("files/redirect-to-echoall"), &d, &default_context_);
+  URLRequest req(test_server_.GetURL("files/redirect-to-echoall"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.set_method("POST");
   req.set_upload(make_scoped_ptr(CreateSimpleUploadData(kData)));
 
@@ -5346,7 +5538,10 @@ TEST_F(URLRequestTestHTTP, InterceptPost302RedirectGet) {
   const char kData[] = "hello world";
 
   TestDelegate d;
-  URLRequest req(test_server_.GetURL("empty.html"), &d, &default_context_);
+  URLRequest req(test_server_.GetURL("empty.html"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.set_method("POST");
   req.set_upload(make_scoped_ptr(CreateSimpleUploadData(kData)));
   HttpRequestHeaders headers;
@@ -5370,7 +5565,10 @@ TEST_F(URLRequestTestHTTP, InterceptPost307RedirectPost) {
   const char kData[] = "hello world";
 
   TestDelegate d;
-  URLRequest req(test_server_.GetURL("empty.html"), &d, &default_context_);
+  URLRequest req(test_server_.GetURL("empty.html"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   req.set_method("POST");
   req.set_upload(make_scoped_ptr(CreateSimpleUploadData(kData)));
   HttpRequestHeaders headers;
@@ -5401,8 +5599,10 @@ TEST_F(URLRequestTestHTTP, DefaultAcceptLanguage) {
   context.Init();
 
   TestDelegate d;
-  URLRequest req(
-      test_server_.GetURL("echoheader?Accept-Language"), &d, &context);
+  URLRequest req(test_server_.GetURL("echoheader?Accept-Language"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &context);
   req.Start();
   base::RunLoop().Run();
   EXPECT_EQ("en", d.data_received());
@@ -5422,8 +5622,10 @@ TEST_F(URLRequestTestHTTP, EmptyAcceptLanguage) {
   context.set_http_user_agent_settings(&settings);
 
   TestDelegate d;
-  URLRequest req(
-      test_server_.GetURL("echoheader?Accept-Language"), &d, &context);
+  URLRequest req(test_server_.GetURL("echoheader?Accept-Language"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &context);
   req.Start();
   base::RunLoop().Run();
   EXPECT_EQ("None", d.data_received());
@@ -5436,6 +5638,7 @@ TEST_F(URLRequestTestHTTP, OverrideAcceptLanguage) {
 
   TestDelegate d;
   URLRequest req(test_server_.GetURL("echoheader?Accept-Language"),
+                 DEFAULT_PRIORITY,
                  &d,
                  &default_context_);
   HttpRequestHeaders headers;
@@ -5452,6 +5655,7 @@ TEST_F(URLRequestTestHTTP, DefaultAcceptEncoding) {
 
   TestDelegate d;
   URLRequest req(test_server_.GetURL("echoheader?Accept-Encoding"),
+                 DEFAULT_PRIORITY,
                  &d,
                  &default_context_);
   HttpRequestHeaders headers;
@@ -5468,6 +5672,7 @@ TEST_F(URLRequestTestHTTP, OverrideAcceptEncoding) {
 
   TestDelegate d;
   URLRequest req(test_server_.GetURL("echoheader?Accept-Encoding"),
+                 DEFAULT_PRIORITY,
                  &d,
                  &default_context_);
   HttpRequestHeaders headers;
@@ -5485,6 +5690,7 @@ TEST_F(URLRequestTestHTTP, SetAcceptCharset) {
 
   TestDelegate d;
   URLRequest req(test_server_.GetURL("echoheader?Accept-Charset"),
+                 DEFAULT_PRIORITY,
                  &d,
                  &default_context_);
   HttpRequestHeaders headers;
@@ -5501,6 +5707,7 @@ TEST_F(URLRequestTestHTTP, DefaultUserAgent) {
 
   TestDelegate d;
   URLRequest req(test_server_.GetURL("echoheader?User-Agent"),
+                 DEFAULT_PRIORITY,
                  &d,
                  &default_context_);
   req.Start();
@@ -5515,6 +5722,7 @@ TEST_F(URLRequestTestHTTP, OverrideUserAgent) {
 
   TestDelegate d;
   URLRequest req(test_server_.GetURL("echoheader?User-Agent"),
+                 DEFAULT_PRIORITY,
                  &d,
                  &default_context_);
   HttpRequestHeaders headers;
@@ -5551,7 +5759,8 @@ TEST_F(URLRequestTestHTTP, EmptyHttpUserAgentSettings) {
 
   for (size_t i = 0; i < ARRAYSIZE_UNSAFE(tests); i++) {
     TestDelegate d;
-    URLRequest req(test_server_.GetURL(tests[i].request), &d, &context);
+    URLRequest req(
+        test_server_.GetURL(tests[i].request), DEFAULT_PRIORITY, &d, &context);
     req.Start();
     base::RunLoop().Run();
     EXPECT_EQ(tests[i].expected_response, d.data_received())
@@ -5565,7 +5774,10 @@ TEST_F(URLRequestTestHTTP, SetSubsequentJobPriority) {
   ASSERT_TRUE(test_server_.Start());
 
   TestDelegate d;
-  URLRequest req(test_server_.GetURL("empty.html"), &d, &default_context_);
+  URLRequest req(test_server_.GetURL("empty.html"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
   EXPECT_EQ(DEFAULT_PRIORITY, req.priority());
 
   scoped_refptr<URLRequestRedirectJob> redirect_job =
@@ -5609,7 +5821,10 @@ TEST_F(HTTPSRequestTest, HTTPSGetTest) {
 
   TestDelegate d;
   {
-    URLRequest r(test_server.GetURL(std::string()), &d, &default_context_);
+    URLRequest r(test_server.GetURL(std::string()),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
@@ -5640,7 +5855,10 @@ TEST_F(HTTPSRequestTest, HTTPSMismatchedTest) {
     TestDelegate d;
     {
       d.set_allow_certificate_errors(err_allowed);
-      URLRequest r(test_server.GetURL(std::string()), &d, &default_context_);
+      URLRequest r(test_server.GetURL(std::string()),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
 
       r.Start();
       EXPECT_TRUE(r.is_pending());
@@ -5676,7 +5894,10 @@ TEST_F(HTTPSRequestTest, HTTPSExpiredTest) {
     TestDelegate d;
     {
       d.set_allow_certificate_errors(err_allowed);
-      URLRequest r(test_server.GetURL(std::string()), &d, &default_context_);
+      URLRequest r(test_server.GetURL(std::string()),
+                   DEFAULT_PRIORITY,
+                   &d,
+                   &default_context_);
 
       r.Start();
       EXPECT_TRUE(r.is_pending());
@@ -5721,7 +5942,8 @@ TEST_F(HTTPSRequestTest, TLSv1Fallback) {
   TestURLRequestContext context(true);
   context.Init();
   d.set_allow_certificate_errors(true);
-  URLRequest r(test_server.GetURL(std::string()), &d, &context);
+  URLRequest r(
+      test_server.GetURL(std::string()), DEFAULT_PRIORITY, &d, &context);
   r.Start();
 
   base::RunLoop().Run();
@@ -5762,6 +5984,7 @@ TEST_F(HTTPSRequestTest, HTTPSPreloadedHSTSTest) {
   TestDelegate d;
   URLRequest r(GURL(base::StringPrintf("https://www.google.com:%d",
                                        test_server.host_port_pair().port())),
+               DEFAULT_PRIORITY,
                &d,
                &context);
 
@@ -5810,6 +6033,7 @@ TEST_F(HTTPSRequestTest, HTTPSErrorsNoClobberTSSTest) {
   TestDelegate d;
   URLRequest r(GURL(base::StringPrintf("https://www.google.com:%d",
                                        test_server.host_port_pair().port())),
+               DEFAULT_PRIORITY,
                &d,
                &context);
 
@@ -5881,6 +6105,7 @@ TEST_F(HTTPSRequestTest, HSTSPreservesPosts) {
 
   URLRequest req(GURL(base::StringPrintf("http://www.somewhere.com:%d/echo",
                                          test_server.host_port_pair().port())),
+                 DEFAULT_PRIORITY,
                  &d,
                  &context);
   req.set_method("POST");
@@ -5914,7 +6139,8 @@ TEST_F(HTTPSRequestTest, SSLv3Fallback) {
   TestURLRequestContext context(true);
   context.Init();
   d.set_allow_certificate_errors(true);
-  URLRequest r(test_server.GetURL(std::string()), &d, &context);
+  URLRequest r(
+      test_server.GetURL(std::string()), DEFAULT_PRIORITY, &d, &context);
   r.Start();
 
   base::RunLoop().Run();
@@ -5963,7 +6189,10 @@ TEST_F(HTTPSRequestTest, ClientAuthTest) {
 
   SSLClientAuthTestDelegate d;
   {
-    URLRequest r(test_server.GetURL(std::string()), &d, &default_context_);
+    URLRequest r(test_server.GetURL(std::string()),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -6002,8 +6231,10 @@ TEST_F(HTTPSRequestTest, ResumeTest) {
 
   {
     TestDelegate d;
-    URLRequest r(
-        test_server.GetURL("ssl-session-cache"), &d, &default_context_);
+    URLRequest r(test_server.GetURL("ssl-session-cache"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -6018,8 +6249,10 @@ TEST_F(HTTPSRequestTest, ResumeTest) {
 
   {
     TestDelegate d;
-    URLRequest r(
-        test_server.GetURL("ssl-session-cache"), &d, &default_context_);
+    URLRequest r(test_server.GetURL("ssl-session-cache"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -6071,8 +6304,10 @@ TEST_F(HTTPSRequestTest, SSLSessionCacheShardTest) {
 
   {
     TestDelegate d;
-    URLRequest r(
-        test_server.GetURL("ssl-session-cache"), &d, &default_context_);
+    URLRequest r(test_server.GetURL("ssl-session-cache"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -6103,8 +6338,10 @@ TEST_F(HTTPSRequestTest, SSLSessionCacheShardTest) {
 
   {
     TestDelegate d;
-    URLRequest r(
-        test_server.GetURL("ssl-session-cache"), &d, &default_context_);
+    URLRequest r(test_server.GetURL("ssl-session-cache"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
 
     r.Start();
     EXPECT_TRUE(r.is_pending());
@@ -6222,7 +6459,8 @@ class HTTPSOCSPTest : public HTTPSRequestTest {
 
     TestDelegate d;
     d.set_allow_certificate_errors(true);
-    URLRequest r(test_server.GetURL(std::string()), &d, &context_);
+    URLRequest r(
+        test_server.GetURL(std::string()), DEFAULT_PRIORITY, &d, &context_);
     r.Start();
 
     base::RunLoop().Run();
@@ -6677,7 +6915,7 @@ TEST_F(URLRequestTestFTP, UnsafePort) {
 
   TestDelegate d;
   {
-    URLRequest r(url, &d, &default_context_);
+    URLRequest r(url, DEFAULT_PRIORITY, &d, &default_context_);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
@@ -6695,7 +6933,8 @@ TEST_F(URLRequestTestFTP, DISABLED_FTPDirectoryListing) {
 
   TestDelegate d;
   {
-    URLRequest r(test_server_.GetURL("/"), &d, &default_context_);
+    URLRequest r(
+        test_server_.GetURL("/"), DEFAULT_PRIORITY, &d, &default_context_);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
@@ -6721,7 +6960,10 @@ TEST_F(URLRequestTestFTP, DISABLED_FTPGetTestAnonymous) {
   app_path = app_path.AppendASCII("LICENSE");
   TestDelegate d;
   {
-    URLRequest r(test_server_.GetURL("/LICENSE"), &d, &default_context_);
+    URLRequest r(test_server_.GetURL("/LICENSE"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
@@ -6752,6 +6994,7 @@ TEST_F(URLRequestTestFTP, DISABLED_FTPGetTest) {
   {
     URLRequest r(
         test_server_.GetURLWithUserAndPassword("/LICENSE", "chrome", "chrome"),
+        DEFAULT_PRIORITY,
         &d,
         &default_context_);
     r.Start();
@@ -6786,12 +7029,11 @@ TEST_F(URLRequestTestFTP, DISABLED_FTPCheckWrongPassword) {
   app_path = app_path.AppendASCII("LICENSE");
   TestDelegate d;
   {
-    URLRequest r(
-        test_server_.GetURLWithUserAndPassword("/LICENSE",
-                                               "chrome",
-                                               "wrong_password"),
-        &d,
-        &default_context_);
+    URLRequest r(test_server_.GetURLWithUserAndPassword(
+                     "/LICENSE", "chrome", "wrong_password"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
@@ -6819,12 +7061,11 @@ TEST_F(URLRequestTestFTP, DISABLED_FTPCheckWrongPasswordRestart) {
   // the initial login with wrong credentials will fail.
   d.set_credentials(AuthCredentials(kChrome, kChrome));
   {
-    URLRequest r(
-        test_server_.GetURLWithUserAndPassword("/LICENSE",
-                                               "chrome",
-                                               "wrong_password"),
-        &d,
-        &default_context_);
+    URLRequest r(test_server_.GetURLWithUserAndPassword(
+                     "/LICENSE", "chrome", "wrong_password"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
@@ -6849,12 +7090,11 @@ TEST_F(URLRequestTestFTP, DISABLED_FTPCheckWrongUser) {
   app_path = app_path.AppendASCII("LICENSE");
   TestDelegate d;
   {
-    URLRequest r(
-        test_server_.GetURLWithUserAndPassword("/LICENSE",
-                                               "wrong_user",
-                                               "chrome"),
-        &d,
-        &default_context_);
+    URLRequest r(test_server_.GetURLWithUserAndPassword(
+                     "/LICENSE", "wrong_user", "chrome"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
@@ -6882,12 +7122,11 @@ TEST_F(URLRequestTestFTP, DISABLED_FTPCheckWrongUserRestart) {
   // the initial login with wrong credentials will fail.
   d.set_credentials(AuthCredentials(kChrome, kChrome));
   {
-    URLRequest r(
-        test_server_.GetURLWithUserAndPassword("/LICENSE",
-                                               "wrong_user",
-                                               "chrome"),
-        &d,
-        &default_context_);
+    URLRequest r(test_server_.GetURLWithUserAndPassword(
+                     "/LICENSE", "wrong_user", "chrome"),
+                 DEFAULT_PRIORITY,
+                 &d,
+                 &default_context_);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
@@ -6915,9 +7154,8 @@ TEST_F(URLRequestTestFTP, DISABLED_FTPCacheURLCredentials) {
   {
     // Pass correct login identity in the URL.
     URLRequest r(
-        test_server_.GetURLWithUserAndPassword("/LICENSE",
-                                               "chrome",
-                                               "chrome"),
+        test_server_.GetURLWithUserAndPassword("/LICENSE", "chrome", "chrome"),
+        DEFAULT_PRIORITY,
         d.get(),
         &default_context_);
     r.Start();
@@ -6937,7 +7175,10 @@ TEST_F(URLRequestTestFTP, DISABLED_FTPCacheURLCredentials) {
   d.reset(new TestDelegate);
   {
     // This request should use cached identity from previous request.
-    URLRequest r(test_server_.GetURL("/LICENSE"), d.get(), &default_context_);
+    URLRequest r(test_server_.GetURL("/LICENSE"),
+                 DEFAULT_PRIORITY,
+                 d.get(),
+                 &default_context_);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
@@ -6966,12 +7207,11 @@ TEST_F(URLRequestTestFTP, DISABLED_FTPCacheLoginBoxCredentials) {
   // the initial login with wrong credentials will fail.
   d->set_credentials(AuthCredentials(kChrome, kChrome));
   {
-    URLRequest r(
-        test_server_.GetURLWithUserAndPassword("/LICENSE",
-                                               "chrome",
-                                               "wrong_password"),
-        d.get(),
-        &default_context_);
+    URLRequest r(test_server_.GetURLWithUserAndPassword(
+                     "/LICENSE", "chrome", "wrong_password"),
+                 DEFAULT_PRIORITY,
+                 d.get(),
+                 &default_context_);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
@@ -6992,7 +7232,10 @@ TEST_F(URLRequestTestFTP, DISABLED_FTPCacheLoginBoxCredentials) {
   {
     // Don't pass wrong credentials in the URL, they would override valid cached
     // ones.
-    URLRequest r(test_server_.GetURL("/LICENSE"), d.get(), &default_context_);
+    URLRequest r(test_server_.GetURL("/LICENSE"),
+                 DEFAULT_PRIORITY,
+                 d.get(),
+                 &default_context_);
     r.Start();
     EXPECT_TRUE(r.is_pending());
 
diff --git a/webkit/browser/appcache/appcache_request_handler_unittest.cc b/webkit/browser/appcache/appcache_request_handler_unittest.cc
index 286fd79..a931477 100644
--- a/webkit/browser/appcache/appcache_request_handler_unittest.cc
+++ b/webkit/browser/appcache/appcache_request_handler_unittest.cc
@@ -13,6 +13,7 @@
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "net/base/net_errors.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
@@ -117,17 +118,12 @@ class AppCacheRequestHandlerTest : public testing::Test {
 
   class MockURLRequest : public net::URLRequest {
    public:
-    MockURLRequest(
-        const GURL& url,
-        net::URLRequestContext* context,
-        net::NetworkDelegate* network_delegate) :
-        net::URLRequest(url, NULL, context, network_delegate),
-        network_delegate_(network_delegate) {
-    }
+    MockURLRequest(const GURL& url, net::URLRequestContext* context)
+        : net::URLRequest(url, net::DEFAULT_PRIORITY, NULL, context) {}
 
     void SimulateResponseCode(int http_response_code) {
       mock_factory_job_ = new MockURLRequestJob(
-          this, network_delegate_, http_response_code);
+          this, context()->network_delegate(), http_response_code);
       Start();
       DCHECK(!mock_factory_job_);
       // All our simulation needs  to satisfy are the following two DCHECKs
@@ -136,17 +132,14 @@ class AppCacheRequestHandlerTest : public testing::Test {
     }
 
     void SimulateResponseInfo(const net::HttpResponseInfo& info) {
-      mock_factory_job_ = new MockURLRequestJob(
-          this, network_delegate_, info);
+      mock_factory_job_ =
+          new MockURLRequestJob(this, context()->network_delegate(), info);
       set_delegate(&delegate_);  // needed to get the info back out
       Start();
       DCHECK(!mock_factory_job_);
     }
 
     MockURLRequestDelegate delegate_;
-
-   private:
-    net::NetworkDelegate* network_delegate_;
   };
 
   static net::URLRequestJob* MockHttpJobFactory(
@@ -178,9 +171,7 @@ class AppCacheRequestHandlerTest : public testing::Test {
 
   // Test harness --------------------------------------------------
 
-  AppCacheRequestHandlerTest()
-      : host_(NULL), empty_network_delegate_(NULL), orig_http_factory_(NULL) {
-  }
+  AppCacheRequestHandlerTest() : host_(NULL), orig_http_factory_(NULL) {}
 
   template <class Method>
   void RunTestOnIOThread(Method method) {
@@ -207,7 +198,6 @@ class AppCacheRequestHandlerTest : public testing::Test {
     const int kHostId = 1;
     backend_impl_->RegisterHost(kHostId);
     host_ = backend_impl_->GetHost(kHostId);
-    empty_network_delegate_ = NULL;
   }
 
   void TearDownTest() {
@@ -224,7 +214,6 @@ class AppCacheRequestHandlerTest : public testing::Test {
     mock_service_.reset();
     mock_policy_.reset();
     host_ = NULL;
-    empty_network_delegate_ = NULL;
   }
 
   void TestFinished() {
@@ -263,13 +252,13 @@ class AppCacheRequestHandlerTest : public testing::Test {
         base::Bind(&AppCacheRequestHandlerTest::Verify_MainResource_Miss,
                    base::Unretained(this)));
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::MAIN_FRAME));
     EXPECT_TRUE(handler_.get());
 
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_TRUE(job_.get());
     EXPECT_TRUE(job_->is_waiting());
 
@@ -291,11 +280,11 @@ class AppCacheRequestHandlerTest : public testing::Test {
     AppCacheURLRequestJob* fallback_job;
     fallback_job = handler_->MaybeLoadFallbackForRedirect(
         request_.get(),
-        empty_network_delegate_,
+        request_->context()->network_delegate(),
         GURL("http://blah/redirect"));
     EXPECT_FALSE(fallback_job);
     fallback_job = handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_);
+        request_.get(), request_->context()->network_delegate());
     EXPECT_FALSE(fallback_job);
 
     EXPECT_TRUE(host_->preferred_manifest_url().is_empty());
@@ -310,8 +299,7 @@ class AppCacheRequestHandlerTest : public testing::Test {
         base::Bind(&AppCacheRequestHandlerTest::Verify_MainResource_Hit,
                    base::Unretained(this)));
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::MAIN_FRAME));
     EXPECT_TRUE(handler_.get());
@@ -321,7 +309,8 @@ class AppCacheRequestHandlerTest : public testing::Test {
         GURL(), AppCacheEntry(),
         1, 2, GURL("http://blah/manifest/"));
 
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_TRUE(job_.get());
     EXPECT_TRUE(job_->is_waiting());
 
@@ -342,7 +331,7 @@ class AppCacheRequestHandlerTest : public testing::Test {
 
     AppCacheURLRequestJob* fallback_job;
     fallback_job = handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_);
+        request_.get(), request_->context()->network_delegate());
     EXPECT_FALSE(fallback_job);
 
     EXPECT_EQ(GURL("http://blah/manifest/"),
@@ -358,8 +347,7 @@ class AppCacheRequestHandlerTest : public testing::Test {
         base::Bind(&AppCacheRequestHandlerTest::Verify_MainResource_Fallback,
                    base::Unretained(this)));
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::MAIN_FRAME));
     EXPECT_TRUE(handler_.get());
@@ -370,7 +358,8 @@ class AppCacheRequestHandlerTest : public testing::Test {
         AppCacheEntry(AppCacheEntry::EXPLICIT, 1),
         1, 2, GURL("http://blah/manifest/"));
 
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_TRUE(job_.get());
     EXPECT_TRUE(job_->is_waiting());
 
@@ -385,14 +374,15 @@ class AppCacheRequestHandlerTest : public testing::Test {
     // When the request is restarted, the existing job is dropped so a
     // real network job gets created. We expect NULL here which will cause
     // the net library to create a real job.
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_FALSE(job_.get());
 
     // Simulate an http error of the real network job.
     request_->SimulateResponseCode(500);
 
     job_ = handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_);
+        request_.get(), request_->context()->network_delegate());
     EXPECT_TRUE(job_.get());
     EXPECT_TRUE(job_->is_delivering_appcache_response());
 
@@ -417,9 +407,8 @@ class AppCacheRequestHandlerTest : public testing::Test {
         &AppCacheRequestHandlerTest::Verify_MainResource_FallbackOverride,
         base::Unretained(this)));
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/fallback-override"),
-        &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/fallback-override"),
+                                      &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::MAIN_FRAME));
     EXPECT_TRUE(handler_.get());
@@ -430,7 +419,8 @@ class AppCacheRequestHandlerTest : public testing::Test {
         AppCacheEntry(AppCacheEntry::EXPLICIT, 1),
         1, 2, GURL("http://blah/manifest/"));
 
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_TRUE(job_.get());
     EXPECT_TRUE(job_->is_waiting());
 
@@ -445,7 +435,8 @@ class AppCacheRequestHandlerTest : public testing::Test {
     // When the request is restarted, the existing job is dropped so a
     // real network job gets created. We expect NULL here which will cause
     // the net library to create a real job.
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_FALSE(job_.get());
 
     // Simulate an http error of the real network job, but with custom
@@ -460,7 +451,7 @@ class AppCacheRequestHandlerTest : public testing::Test {
     request_->SimulateResponseInfo(info);
 
     job_ = handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_);
+        request_.get(), request_->context()->network_delegate());
     EXPECT_FALSE(job_.get());
 
     TestFinished();
@@ -469,8 +460,7 @@ class AppCacheRequestHandlerTest : public testing::Test {
   // SubResource_Miss_WithNoCacheSelected ----------------------------------
 
   void SubResource_Miss_WithNoCacheSelected() {
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::SUB_RESOURCE));
 
@@ -488,22 +478,24 @@ class AppCacheRequestHandlerTest : public testing::Test {
     // in a network or fallback namespace, should result in a failed request.
     host_->AssociateCompleteCache(MakeNewCache());
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::SUB_RESOURCE));
     EXPECT_TRUE(handler_.get());
 
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_TRUE(job_.get());
     EXPECT_TRUE(job_->is_delivering_error_response());
 
     AppCacheURLRequestJob* fallback_job;
     fallback_job = handler_->MaybeLoadFallbackForRedirect(
-        request_.get(), empty_network_delegate_, GURL("http://blah/redirect"));
+        request_.get(),
+        request_->context()->network_delegate(),
+        GURL("http://blah/redirect"));
     EXPECT_FALSE(fallback_job);
     fallback_job = handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_);
+        request_.get(), request_->context()->network_delegate());
     EXPECT_FALSE(fallback_job);
 
     TestFinished();
@@ -517,12 +509,12 @@ class AppCacheRequestHandlerTest : public testing::Test {
     host_->pending_selected_cache_id_ = cache->cache_id();
     host_->set_preferred_manifest_url(cache->owning_group()->manifest_url());
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::SUB_RESOURCE));
     EXPECT_TRUE(handler_.get());
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_TRUE(job_.get());
     EXPECT_TRUE(job_->is_waiting());
 
@@ -532,10 +524,12 @@ class AppCacheRequestHandlerTest : public testing::Test {
 
     AppCacheURLRequestJob* fallback_job;
     fallback_job = handler_->MaybeLoadFallbackForRedirect(
-        request_.get(), empty_network_delegate_, GURL("http://blah/redirect"));
+        request_.get(),
+        request_->context()->network_delegate(),
+        GURL("http://blah/redirect"));
     EXPECT_FALSE(fallback_job);
     fallback_job = handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_);
+        request_.get(), request_->context()->network_delegate());
     EXPECT_FALSE(fallback_job);
 
     TestFinished();
@@ -549,21 +543,23 @@ class AppCacheRequestHandlerTest : public testing::Test {
     mock_storage()->SimulateFindSubResource(
         AppCacheEntry(AppCacheEntry::EXPLICIT, 1), AppCacheEntry(), false);
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::SUB_RESOURCE));
     EXPECT_TRUE(handler_.get());
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_TRUE(job_.get());
     EXPECT_TRUE(job_->is_delivering_appcache_response());
 
     AppCacheURLRequestJob* fallback_job;
     fallback_job = handler_->MaybeLoadFallbackForRedirect(
-        request_.get(), empty_network_delegate_, GURL("http://blah/redirect"));
+        request_.get(),
+        request_->context()->network_delegate(),
+        GURL("http://blah/redirect"));
     EXPECT_FALSE(fallback_job);
     fallback_job = handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_);
+        request_.get(), request_->context()->network_delegate());
     EXPECT_FALSE(fallback_job);
 
     TestFinished();
@@ -579,24 +575,24 @@ class AppCacheRequestHandlerTest : public testing::Test {
     mock_storage()->SimulateFindSubResource(
         AppCacheEntry(), AppCacheEntry(AppCacheEntry::EXPLICIT, 1), false);
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::SUB_RESOURCE));
     EXPECT_TRUE(handler_.get());
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_FALSE(job_.get());
 
     job_ = handler_->MaybeLoadFallbackForRedirect(
         request_.get(),
-        empty_network_delegate_,
+        request_->context()->network_delegate(),
         GURL("http://not_blah/redirect"));
     EXPECT_TRUE(job_.get());
     EXPECT_TRUE(job_->is_delivering_appcache_response());
 
     AppCacheURLRequestJob* fallback_job;
     fallback_job = handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_);
+        request_.get(), request_->context()->network_delegate());
     EXPECT_FALSE(fallback_job);
 
     TestFinished();
@@ -612,22 +608,24 @@ class AppCacheRequestHandlerTest : public testing::Test {
     mock_storage()->SimulateFindSubResource(
         AppCacheEntry(), AppCacheEntry(AppCacheEntry::EXPLICIT, 1), false);
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::SUB_RESOURCE));
     EXPECT_TRUE(handler_.get());
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_FALSE(job_.get());
 
     AppCacheURLRequestJob* fallback_job;
     fallback_job = handler_->MaybeLoadFallbackForRedirect(
-        request_.get(), empty_network_delegate_, GURL("http://blah/redirect"));
+        request_.get(),
+        request_->context()->network_delegate(),
+        GURL("http://blah/redirect"));
     EXPECT_FALSE(fallback_job);
 
     request_->SimulateResponseCode(200);
     fallback_job = handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_);
+        request_.get(), request_->context()->network_delegate());
     EXPECT_FALSE(fallback_job);
 
     TestFinished();
@@ -644,20 +642,22 @@ class AppCacheRequestHandlerTest : public testing::Test {
     mock_storage()->SimulateFindSubResource(
         AppCacheEntry(), AppCacheEntry(), true);
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::SUB_RESOURCE));
     EXPECT_TRUE(handler_.get());
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_FALSE(job_.get());
 
     AppCacheURLRequestJob* fallback_job;
     fallback_job = handler_->MaybeLoadFallbackForRedirect(
-        request_.get(), empty_network_delegate_, GURL("http://blah/redirect"));
+        request_.get(),
+        request_->context()->network_delegate(),
+        GURL("http://blah/redirect"));
     EXPECT_FALSE(fallback_job);
     fallback_job = handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_);
+        request_.get(), request_->context()->network_delegate());
     EXPECT_FALSE(fallback_job);
 
     TestFinished();
@@ -671,8 +671,7 @@ class AppCacheRequestHandlerTest : public testing::Test {
     mock_storage()->SimulateFindSubResource(
         AppCacheEntry(AppCacheEntry::EXPLICIT, 1), AppCacheEntry(), false);
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::SUB_RESOURCE));
     EXPECT_TRUE(handler_.get());
@@ -681,11 +680,13 @@ class AppCacheRequestHandlerTest : public testing::Test {
     host_ = NULL;
 
     EXPECT_FALSE(handler_->MaybeLoadResource(
-        request_.get(), empty_network_delegate_));
+        request_.get(), request_->context()->network_delegate()));
     EXPECT_FALSE(handler_->MaybeLoadFallbackForRedirect(
-        request_.get(), empty_network_delegate_, GURL("http://blah/redirect")));
+        request_.get(),
+        request_->context()->network_delegate(),
+        GURL("http://blah/redirect")));
     EXPECT_FALSE(handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_));
+        request_.get(), request_->context()->network_delegate()));
 
     TestFinished();
   }
@@ -696,13 +697,13 @@ class AppCacheRequestHandlerTest : public testing::Test {
     // Precondition, the host is waiting on cache selection.
     host_->pending_selected_cache_id_ = 1;
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::SUB_RESOURCE));
     EXPECT_TRUE(handler_.get());
 
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_TRUE(job_.get());
     EXPECT_TRUE(job_->is_waiting());
 
@@ -711,11 +712,13 @@ class AppCacheRequestHandlerTest : public testing::Test {
     EXPECT_TRUE(job_->has_been_killed());
 
     EXPECT_FALSE(handler_->MaybeLoadResource(
-        request_.get(), empty_network_delegate_));
+        request_.get(), request_->context()->network_delegate()));
     EXPECT_FALSE(handler_->MaybeLoadFallbackForRedirect(
-        request_.get(), empty_network_delegate_, GURL("http://blah/redirect")));
+        request_.get(),
+        request_->context()->network_delegate(),
+        GURL("http://blah/redirect")));
     EXPECT_FALSE(handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_));
+        request_.get(), request_->context()->network_delegate()));
 
     TestFinished();
   }
@@ -726,18 +729,19 @@ class AppCacheRequestHandlerTest : public testing::Test {
     // Precondition, the host is waiting on cache selection.
     host_->pending_selected_cache_id_ = 1;
 
-    request_.reset(new MockURLRequest(
-        GURL("ftp://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("ftp://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::SUB_RESOURCE));
     EXPECT_TRUE(handler_.get());  // we could redirect to http (conceivably)
 
     EXPECT_FALSE(handler_->MaybeLoadResource(
-        request_.get(), empty_network_delegate_));
+        request_.get(), request_->context()->network_delegate()));
     EXPECT_FALSE(handler_->MaybeLoadFallbackForRedirect(
-        request_.get(), empty_network_delegate_, GURL("ftp://blah/redirect")));
+        request_.get(),
+        request_->context()->network_delegate(),
+        GURL("ftp://blah/redirect")));
     EXPECT_FALSE(handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_));
+        request_.get(), request_->context()->network_delegate()));
 
     TestFinished();
   }
@@ -745,13 +749,13 @@ class AppCacheRequestHandlerTest : public testing::Test {
   // CanceledRequest -----------------------------
 
   void CanceledRequest() {
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::MAIN_FRAME));
     EXPECT_TRUE(handler_.get());
 
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_TRUE(job_.get());
     EXPECT_TRUE(job_->is_waiting());
     EXPECT_FALSE(job_->has_been_started());
@@ -764,7 +768,7 @@ class AppCacheRequestHandlerTest : public testing::Test {
     EXPECT_TRUE(job_->has_been_killed());
 
     EXPECT_FALSE(handler_->MaybeLoadFallbackForResponse(
-        request_.get(), empty_network_delegate_));
+        request_.get(), request_->context()->network_delegate()));
 
     TestFinished();
   }
@@ -781,8 +785,7 @@ class AppCacheRequestHandlerTest : public testing::Test {
     EXPECT_FALSE(AppCacheRequestHandler::IsMainResourceType(
         ResourceType::WORKER));
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
 
     const int kParentHostId = host_->host_id();
     const int kWorkerHostId = 2;
@@ -819,8 +822,7 @@ class AppCacheRequestHandlerTest : public testing::Test {
         base::Bind(&AppCacheRequestHandlerTest::Verify_MainResource_Blocked,
                    base::Unretained(this)));
 
-    request_.reset(new MockURLRequest(
-        GURL("http://blah/"), &empty_context_, empty_network_delegate_));
+    request_.reset(new MockURLRequest(GURL("http://blah/"), &empty_context_));
     handler_.reset(host_->CreateRequestHandler(request_.get(),
                                                ResourceType::MAIN_FRAME));
     EXPECT_TRUE(handler_.get());
@@ -831,7 +833,8 @@ class AppCacheRequestHandlerTest : public testing::Test {
         GURL(), AppCacheEntry(),
         1, 2, GURL("http://blah/manifest/"));
 
-    job_ = handler_->MaybeLoadResource(request_.get(), empty_network_delegate_);
+    job_ = handler_->MaybeLoadResource(request_.get(),
+                                       request_->context()->network_delegate());
     EXPECT_TRUE(job_.get());
     EXPECT_TRUE(job_->is_waiting());
 
@@ -880,7 +883,6 @@ class AppCacheRequestHandlerTest : public testing::Test {
   scoped_ptr<MockAppCachePolicy> mock_policy_;
   AppCacheHost* host_;
   net::URLRequestContext empty_context_;
-  net::NetworkDelegate* empty_network_delegate_;
   scoped_ptr<MockURLRequest> request_;
   scoped_ptr<AppCacheRequestHandler> handler_;
   scoped_refptr<AppCacheURLRequestJob> job_;
diff --git a/webkit/browser/appcache/appcache_storage_impl_unittest.cc b/webkit/browser/appcache/appcache_storage_impl_unittest.cc
index 9739f06..615b53d 100644
--- a/webkit/browser/appcache/appcache_storage_impl_unittest.cc
+++ b/webkit/browser/appcache/appcache_storage_impl_unittest.cc
@@ -9,10 +9,12 @@
 #include "base/callback.h"
 #include "base/file_util.h"
 #include "base/files/scoped_temp_dir.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/message_loop/message_loop.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/threading/thread.h"
 #include "net/base/net_errors.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request_error_job.h"
 #include "net/url_request/url_request_job_factory_impl.h"
@@ -1704,8 +1706,8 @@ class AppCacheStorageImplTest : public testing::Test {
       backend_->RegisterHost(2);
       AppCacheHost* host2 = backend_->GetHost(2);
       GURL manifest_url = MockHttpServer::GetMockUrl("manifest");
-      request_.reset(
-          service()->request_context()->CreateRequest(manifest_url, NULL));
+      request_ = service()->request_context()->CreateRequest(
+          manifest_url, net::DEFAULT_PRIORITY, NULL);
       AppCacheInterceptor::SetExtraRequestInfo(
           request_.get(), service_.get(),
           backend_->process_id(), host2->host_id(),
diff --git a/webkit/browser/appcache/appcache_update_job.cc b/webkit/browser/appcache/appcache_update_job.cc
index c3ea6b4..e4f14de 100644
--- a/webkit/browser/appcache/appcache_update_job.cc
+++ b/webkit/browser/appcache/appcache_update_job.cc
@@ -13,6 +13,7 @@
 #include "net/base/io_buffer.h"
 #include "net/base/load_flags.h"
 #include "net/base/net_errors.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_request_headers.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request_context.h"
@@ -91,15 +92,16 @@ AppCacheUpdateJob::UrlToFetch::~UrlToFetch() {
 // Helper class to fetch resources. Depending on the fetch type,
 // can either fetch to an in-memory string or write the response
 // data out to the disk cache.
-AppCacheUpdateJob::URLFetcher::URLFetcher(
-    const GURL& url, FetchType fetch_type, AppCacheUpdateJob* job)
+AppCacheUpdateJob::URLFetcher::URLFetcher(const GURL& url,
+                                          FetchType fetch_type,
+                                          AppCacheUpdateJob* job)
     : url_(url),
       job_(job),
       fetch_type_(fetch_type),
       retry_503_attempts_(0),
       buffer_(new net::IOBuffer(kBufferSize)),
-      request_(job->service_->request_context()->CreateRequest(url, this)) {
-}
+      request_(job->service_->request_context()
+                   ->CreateRequest(url, net::DEFAULT_PRIORITY, this)) {}
 
 AppCacheUpdateJob::URLFetcher::~URLFetcher() {
 }
@@ -287,7 +289,8 @@ bool AppCacheUpdateJob::URLFetcher::MaybeRetryRequest() {
     return false;
   }
   ++retry_503_attempts_;
-  request_.reset(job_->service_->request_context()->CreateRequest(url_, this));
+  request_ = job_->service_->request_context()->CreateRequest(
+      url_, net::DEFAULT_PRIORITY, this);
   Start();
   return true;
 }
diff --git a/webkit/browser/appcache/appcache_url_request_job_unittest.cc b/webkit/browser/appcache/appcache_url_request_job_unittest.cc
index 95ad3bb..3f9675a 100644
--- a/webkit/browser/appcache/appcache_url_request_job_unittest.cc
+++ b/webkit/browser/appcache/appcache_url_request_job_unittest.cc
@@ -14,6 +14,7 @@
 #include "base/threading/thread.h"
 #include "net/base/io_buffer.h"
 #include "net/base/net_errors.h"
+#include "net/base/request_priority.h"
 #include "net/http/http_response_headers.h"
 #include "net/url_request/url_request.h"
 #include "net/url_request/url_request_context.h"
@@ -376,7 +377,8 @@ class AppCacheURLRequestJobTest : public testing::Test {
   // Basic -------------------------------------------------------------------
   void Basic() {
     AppCacheStorage* storage = service_->storage();
-    net::URLRequest request(GURL("http://blah/"), NULL, &empty_context_);
+    net::URLRequest request(
+        GURL("http://blah/"), net::DEFAULT_PRIORITY, NULL, &empty_context_);
     scoped_refptr<AppCacheURLRequestJob> job;
 
     // Create an instance and see that it looks as expected.
@@ -399,7 +401,8 @@ class AppCacheURLRequestJobTest : public testing::Test {
   // DeliveryOrders -----------------------------------------------------
   void DeliveryOrders() {
     AppCacheStorage* storage = service_->storage();
-    net::URLRequest request(GURL("http://blah/"), NULL, &empty_context_);
+    net::URLRequest request(
+        GURL("http://blah/"), net::DEFAULT_PRIORITY, NULL, &empty_context_);
     scoped_refptr<AppCacheURLRequestJob> job;
 
     // Create an instance, give it a delivery order and see that
@@ -443,8 +446,9 @@ class AppCacheURLRequestJobTest : public testing::Test {
                    base::Unretained(this)));
 
     AppCacheStorage* storage = service_->storage();
-    request_.reset(empty_context_.CreateRequest(
-        GURL("http://blah/"), url_request_delegate_.get()));
+    request_ = empty_context_.CreateRequest(GURL("http://blah/"),
+                                            net::DEFAULT_PRIORITY,
+                                            url_request_delegate_.get());
 
     // Setup to create an AppCacheURLRequestJob with orders to deliver
     // a network response.
@@ -477,8 +481,9 @@ class AppCacheURLRequestJobTest : public testing::Test {
                    base::Unretained(this)));
 
     AppCacheStorage* storage = service_->storage();
-    request_.reset(empty_context_.CreateRequest(GURL(
-        "http://blah/"), url_request_delegate_.get()));
+    request_ = empty_context_.CreateRequest(GURL("http://blah/"),
+                                            net::DEFAULT_PRIORITY,
+                                            url_request_delegate_.get());
 
     // Setup to create an AppCacheURLRequestJob with orders to deliver
     // a network response.
@@ -526,8 +531,9 @@ class AppCacheURLRequestJobTest : public testing::Test {
 
   void RequestAppCachedResource(bool start_after_delivery_orders) {
     AppCacheStorage* storage = service_->storage();
-    request_.reset(empty_context_.CreateRequest(
-        GURL("http://blah/"), url_request_delegate_.get()));
+    request_ = empty_context_.CreateRequest(GURL("http://blah/"),
+                                            net::DEFAULT_PRIORITY,
+                                            url_request_delegate_.get());
 
     // Setup to create an AppCacheURLRequestJob with orders to deliver
     // a network response.
@@ -639,8 +645,9 @@ class AppCacheURLRequestJobTest : public testing::Test {
 
   void MakeRangeRequest() {
     AppCacheStorage* storage = service_->storage();
-    request_.reset(empty_context_.CreateRequest(
-        GURL("http://blah/"), url_request_delegate_.get()));
+    request_ = empty_context_.CreateRequest(GURL("http://blah/"),
+                                            net::DEFAULT_PRIORITY,
+                                            url_request_delegate_.get());
 
     // Request a range, the 3 middle chars out of 'Hello'
     net::HttpRequestHeaders extra_headers;
diff --git a/webkit/browser/blob/blob_url_request_job_factory.cc b/webkit/browser/blob/blob_url_request_job_factory.cc
index ed0a400..f36e0a5 100644
--- a/webkit/browser/blob/blob_url_request_job_factory.cc
+++ b/webkit/browser/blob/blob_url_request_job_factory.cc
@@ -8,6 +8,7 @@
 #include "base/compiler_specific.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/strings/string_util.h"
+#include "net/base/request_priority.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_job_factory.h"
 #include "webkit/browser/blob/blob_data_handle.h"
@@ -28,15 +29,15 @@ BlobDataHandle* GetRequestedBlobDataHandle(net::URLRequest* request) {
 }  // namespace
 
 // static
-net::URLRequest* BlobProtocolHandler::CreateBlobRequest(
+scoped_ptr<net::URLRequest> BlobProtocolHandler::CreateBlobRequest(
     scoped_ptr<BlobDataHandle> blob_data_handle,
     const net::URLRequestContext* request_context,
     net::URLRequest::Delegate* request_delegate) {
   const GURL kBlobUrl("blob://see_user_data/");
-  net::URLRequest* request = request_context->CreateRequest(
-      kBlobUrl, request_delegate);
-  SetRequestedBlobDataHandle(request, blob_data_handle.Pass());
-  return request;
+  scoped_ptr<net::URLRequest> request = request_context->CreateRequest(
+      kBlobUrl, net::DEFAULT_PRIORITY, request_delegate);
+  SetRequestedBlobDataHandle(request.get(), blob_data_handle.Pass());
+  return request.Pass();
 }
 
 // static
diff --git a/webkit/browser/blob/blob_url_request_job_factory.h b/webkit/browser/blob/blob_url_request_job_factory.h
index 88ccc64..954aaee 100644
--- a/webkit/browser/blob/blob_url_request_job_factory.h
+++ b/webkit/browser/blob/blob_url_request_job_factory.h
@@ -34,7 +34,7 @@ class WEBKIT_STORAGE_BROWSER_EXPORT BlobProtocolHandler
     : public net::URLRequestJobFactory::ProtocolHandler {
  public:
   // A helper to manufacture an URLRequest to retrieve the given blob.
-  static net::URLRequest* CreateBlobRequest(
+  static scoped_ptr<net::URLRequest> CreateBlobRequest(
       scoped_ptr<BlobDataHandle> blob_data_handle,
       const net::URLRequestContext* request_context,
       net::URLRequest::Delegate* request_delegate);