Created new URLRequestContext for secure proxy check.

The new URLRequestContext disables alternate protocols
to ensure that the Data Reduction Proxy secure proxy check
request goes out over vanilla HTTP so that it can be
intercepted by middleboxes.

Also, secure proxy check is now done on IO thread.

BUG=437080

Committed: https://crrev.com/652eabf1141c00594aa6e9ed81beb980aec89198
Cr-Commit-Position: refs/heads/master@{#325302}

Review URL: https://codereview.chromium.org/981633002

Cr-Commit-Position: refs/heads/master@{#325464}

10 files changed, 152 insertions, 144 deletions

diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config.cc
index 9ee5108..e29759a 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config.cc
@@ -11,10 +11,14 @@
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_util.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_configurator.h"
-#include "components/data_reduction_proxy/core/browser/data_reduction_proxy_service.h"
 #include "components/data_reduction_proxy/core/common/data_reduction_proxy_config_values.h"
 #include "components/data_reduction_proxy/core/common/data_reduction_proxy_event_store.h"
+#include "components/data_reduction_proxy/core/common/data_reduction_proxy_params.h"
+#include "net/base/load_flags.h"
+#include "net/http/http_network_layer.h"
 #include "net/proxy/proxy_server.h"
+#include "net/url_request/url_fetcher.h"
+#include "net/url_request/url_fetcher_delegate.h"
 #include "net/url_request/url_request_context.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "net/url_request/url_request_status.h"
@@ -46,9 +50,82 @@ void RecordNetworkChangeEvent(DataReductionProxyNetworkChangeEvent event) {
 
 namespace data_reduction_proxy {
 
+// Checks if the secure proxy is allowed by the carrier by sending a probe.
+class SecureProxyChecker : public net::URLFetcherDelegate {
+ public:
+  SecureProxyChecker(net::URLRequestContext* url_request_context,
+                     scoped_refptr<base::SingleThreadTaskRunner> io_task_runner)
+      : io_task_runner_(io_task_runner) {
+    DCHECK(io_task_runner_->BelongsToCurrentThread());
+
+    url_request_context_.reset(new net::URLRequestContext());
+    url_request_context_->CopyFrom(url_request_context);
+
+    net::HttpNetworkSession::Params params_modified =
+        *(url_request_context_->GetNetworkSessionParams());
+    params_modified.enable_quic = false;
+    params_modified.next_protos = net::NextProtosWithSpdyAndQuic(false, false);
+
+    http_network_layer_.reset(new net::HttpNetworkLayer(
+        new net::HttpNetworkSession(params_modified)));
+    url_request_context_->set_http_transaction_factory(
+        http_network_layer_.get());
+
+    url_request_context_getter_ = new net::TrivialURLRequestContextGetter(
+        url_request_context_.get(), io_task_runner_);
+  }
+
+  void OnURLFetchComplete(const net::URLFetcher* source) override {
+    DCHECK(io_task_runner_->BelongsToCurrentThread());
+    DCHECK_EQ(source, fetcher_.get());
+    net::URLRequestStatus status = source->GetStatus();
+
+    std::string response;
+    source->GetResponseAsString(&response);
+
+    fetcher_callback_.Run(response, status);
+  }
+
+  void CheckIfSecureProxyIsAllowed(const GURL& secure_proxy_check_url,
+                                   FetcherResponseCallback fetcher_callback) {
+    DCHECK(io_task_runner_->BelongsToCurrentThread());
+    fetcher_.reset(net::URLFetcher::Create(secure_proxy_check_url,
+                                           net::URLFetcher::GET, this));
+    fetcher_->SetLoadFlags(net::LOAD_DISABLE_CACHE | net::LOAD_BYPASS_PROXY);
+    fetcher_->SetRequestContext(url_request_context_getter_.get());
+    // Configure max retries to be at most kMaxRetries times for 5xx errors.
+    static const int kMaxRetries = 5;
+    fetcher_->SetMaxRetriesOn5xx(kMaxRetries);
+    fetcher_->SetAutomaticallyRetryOnNetworkChanges(kMaxRetries);
+    // The secure proxy check should not be redirected. Since the secure proxy
+    // check will inevitably fail if it gets redirected somewhere else (e.g. by
+    // a captive portal), short circuit that by giving up on the secure proxy
+    // check if it gets redirected.
+    fetcher_->SetStopOnRedirect(true);
+
+    fetcher_callback_ = fetcher_callback;
+
+    fetcher_->Start();
+  }
+
+  ~SecureProxyChecker() override {}
+
+ private:
+  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
+
+  scoped_refptr<net::URLRequestContextGetter> url_request_context_getter_;
+  scoped_ptr<net::URLRequestContext> url_request_context_;
+  scoped_ptr<net::HttpNetworkLayer> http_network_layer_;
+
+  // The URLFetcher being used for the secure proxy check.
+  scoped_ptr<net::URLFetcher> fetcher_;
+  FetcherResponseCallback fetcher_callback_;
+
+  DISALLOW_COPY_AND_ASSIGN(SecureProxyChecker);
+};
+
 DataReductionProxyConfig::DataReductionProxyConfig(
     scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
     net::NetLog* net_log,
     scoped_ptr<DataReductionProxyConfigValues> config_values,
     DataReductionProxyConfigurator* configurator,
@@ -60,13 +137,11 @@ DataReductionProxyConfig::DataReductionProxyConfig(
       alternative_enabled_by_user_(false),
       config_values_(config_values.Pass()),
       io_task_runner_(io_task_runner),
-      ui_task_runner_(ui_task_runner),
       net_log_(net_log),
       configurator_(configurator),
       event_store_(event_store),
       url_request_context_getter_(nullptr) {
   DCHECK(io_task_runner);
-  DCHECK(ui_task_runner);
   DCHECK(configurator);
   DCHECK(event_store);
 }
@@ -75,15 +150,15 @@ DataReductionProxyConfig::~DataReductionProxyConfig() {
   net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
 }
 
-void DataReductionProxyConfig::SetDataReductionProxyService(
-    base::WeakPtr<DataReductionProxyService> data_reduction_proxy_service) {
-  data_reduction_proxy_service_ = data_reduction_proxy_service;
-}
-
 void DataReductionProxyConfig::InitializeOnIOThread(
     net::URLRequestContextGetter* url_request_context_getter) {
   DCHECK(url_request_context_getter);
   url_request_context_getter_ = url_request_context_getter;
+
+  DCHECK(url_request_context_getter_->GetURLRequestContext());
+  secure_proxy_checker_.reset(new SecureProxyChecker(
+      url_request_context_getter_->GetURLRequestContext(), io_task_runner_));
+
   if (!config_values_->allowed())
     return;
 
@@ -256,9 +331,13 @@ void DataReductionProxyConfig::SetProxyConfig(
   if (enabled &&
       !(alternative_enabled &&
         !config_values_->alternative_fallback_allowed())) {
-    ui_task_runner_->PostTask(
-        FROM_HERE, base::Bind(&DataReductionProxyConfig::StartSecureProxyCheck,
-                              base::Unretained(this)));
+    // It is safe to use base::Unretained here, since it gets executed
+    // synchronously on the IO thread, and |this| outlives
+    // |secure_proxy_checker_|.
+    SecureProxyCheck(
+        config_values_->secure_proxy_check_url(),
+        base::Bind(&DataReductionProxyConfig::HandleSecureProxyCheckResponse,
+                   base::Unretained(this)));
   }
 }
 
@@ -322,16 +401,7 @@ void DataReductionProxyConfig::LogProxyState(bool enabled,
 
 void DataReductionProxyConfig::HandleSecureProxyCheckResponse(
     const std::string& response, const net::URLRequestStatus& status) {
-  DCHECK(ui_task_runner_->BelongsToCurrentThread());
-  io_task_runner_->PostTask(
-      FROM_HERE,
-      base::Bind(
-          &DataReductionProxyConfig::HandleSecureProxyCheckResponseOnIOThread,
-          base::Unretained(this), response, status));
-}
-
-void DataReductionProxyConfig::HandleSecureProxyCheckResponseOnIOThread(
-    const std::string& response, const net::URLRequestStatus& status) {
+  DCHECK(io_task_runner_->BelongsToCurrentThread());
   if (event_store_) {
     event_store_->EndSecureProxyCheck(bound_net_log_, status.error());
   }
@@ -394,9 +464,13 @@ void DataReductionProxyConfig::OnIPAddressChanged() {
       return;
     }
 
-    ui_task_runner_->PostTask(
-        FROM_HERE, base::Bind(&DataReductionProxyConfig::StartSecureProxyCheck,
-                              base::Unretained(this)));
+    // It is safe to use base::Unretained here, since it gets executed
+    // synchronously on the IO thread, and |this| outlives
+    // |secure_proxy_checker_|.
+    SecureProxyCheck(
+        config_values_->secure_proxy_check_url(),
+        base::Bind(&DataReductionProxyConfig::HandleSecureProxyCheckResponse,
+                   base::Unretained(this)));
   }
 }
 
@@ -432,21 +506,21 @@ void DataReductionProxyConfig::RecordSecureProxyCheckFetchResult(
                             SECURE_PROXY_CHECK_FETCH_RESULT_COUNT);
 }
 
-void DataReductionProxyConfig::StartSecureProxyCheck() {
-  DCHECK(ui_task_runner_->BelongsToCurrentThread());
+void DataReductionProxyConfig::SecureProxyCheck(
+    const GURL& secure_proxy_check_url,
+    FetcherResponseCallback fetcher_callback) {
+  DCHECK(io_task_runner_->BelongsToCurrentThread());
   bound_net_log_ = net::BoundNetLog::Make(
       net_log_, net::NetLog::SOURCE_DATA_REDUCTION_PROXY);
-  if (data_reduction_proxy_service_) {
-    if (event_store_) {
-      event_store_->BeginSecureProxyCheck(
-          bound_net_log_, config_values_->secure_proxy_check_url());
-    }
 
-    data_reduction_proxy_service_->SecureProxyCheck(
-        config_values_->secure_proxy_check_url(),
-        base::Bind(&DataReductionProxyConfig::HandleSecureProxyCheckResponse,
-                   base::Unretained(this)));
+  if (event_store_) {
+    event_store_->BeginSecureProxyCheck(
+        bound_net_log_, config_values_->secure_proxy_check_url());
   }
+
+  DCHECK(secure_proxy_checker_);
+  secure_proxy_checker_->CheckIfSecureProxyIsAllowed(secure_proxy_check_url,
+                                                     fetcher_callback);
 }
 
 void DataReductionProxyConfig::GetNetworkList(
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config.h b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config.h
index 770c032..9acf691 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config.h
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config.h
@@ -5,6 +5,9 @@
 #ifndef COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_CONFIG_H_
 #define COMPONENTS_DATA_REDUCTION_PROXY_CORE_BROWSER_DATA_REDUCTION_PROXY_CONFIG_H_
 
+#include <string>
+
+#include "base/callback.h"
 #include "base/gtest_prod_util.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
@@ -17,6 +20,8 @@
 #include "net/proxy/proxy_config.h"
 #include "net/proxy/proxy_retry_info.h"
 
+class GURL;
+
 namespace base {
 class SingleThreadTaskRunner;
 class TimeDelta;
@@ -25,6 +30,7 @@ class TimeDelta;
 namespace net {
 class HostPortPair;
 class NetLog;
+class URLFetcher;
 class URLRequest;
 class URLRequestContextGetter;
 class URLRequestStatus;
@@ -32,10 +38,14 @@ class URLRequestStatus;
 
 namespace data_reduction_proxy {
 
+typedef base::Callback<void(const std::string&, const net::URLRequestStatus&)>
+    FetcherResponseCallback;
+
 class DataReductionProxyConfigValues;
 class DataReductionProxyConfigurator;
 class DataReductionProxyEventStore;
 class DataReductionProxyService;
+class SecureProxyChecker;
 struct DataReductionProxyTypeInfo;
 
 // Values of the UMA DataReductionProxy.ProbeURL histogram.
@@ -75,16 +85,12 @@ class DataReductionProxyConfig
   // which this instance will own.
   DataReductionProxyConfig(
       scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
-      scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner,
       net::NetLog* net_log,
       scoped_ptr<DataReductionProxyConfigValues> config_values,
       DataReductionProxyConfigurator* configurator,
       DataReductionProxyEventStore* event_store);
   ~DataReductionProxyConfig() override;
 
-  void SetDataReductionProxyService(
-      base::WeakPtr<DataReductionProxyService> data_reduction_proxy_service);
-
   // Performs initialization on the IO thread.
   void InitializeOnIOThread(
       net::URLRequestContextGetter* url_request_context_getter);
@@ -215,16 +221,16 @@ class DataReductionProxyConfig
                                   bool restricted,
                                   bool at_startup);
 
-  // Begins a secure proxy check to determine if the Data Reduction Proxy is
-  // permitted to use the HTTPS proxy servers.
-  void StartSecureProxyCheck();
+  // Requests the given |secure_proxy_check_url|. Upon completion, returns the
+  // results to the caller via the |fetcher_callback|. Virtualized for unit
+  // testing.
+  virtual void SecureProxyCheck(const GURL& secure_proxy_check_url,
+                                FetcherResponseCallback fetcher_callback);
 
   // Parses the secure proxy check responses and appropriately configures the
   // Data Reduction Proxy rules.
   virtual void HandleSecureProxyCheckResponse(
       const std::string& response, const net::URLRequestStatus& status);
-  virtual void HandleSecureProxyCheckResponseOnIOThread(
-      const std::string& response, const net::URLRequestStatus& status);
 
   // Adds the default proxy bypass rules for the Data Reduction Proxy.
   void AddDefaultProxyBypassRules();
@@ -246,6 +252,8 @@ class DataReductionProxyConfig
       bool is_https,
       base::TimeDelta* min_retry_delay) const;
 
+  scoped_ptr<SecureProxyChecker> secure_proxy_checker_;
+
   bool restricted_by_carrier_;
   bool disabled_on_vpn_;
   bool unreachable_;
@@ -259,10 +267,6 @@ class DataReductionProxyConfig
   // IO thread.
   scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 
-  // |ui_task_runner_| should be the task runner for running operations on the
-  // UI thread.
-  scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner_;
-
   // The caller must ensure that the |net_log_|, if set, outlives this instance.
   // It is used to create new instances of |bound_net_log_| on secure proxy
   // checks. |bound_net_log_| permits the correlation of the begin and end
@@ -283,11 +287,6 @@ class DataReductionProxyConfig
   // Enforce usage on the IO thread.
   base::ThreadChecker thread_checker_;
 
-  // A weak pointer to a |DataReductionProxyService| to perform secure proxy
-  // checks. The weak pointer is required since the |DataReductionProxyService|
-  // is destroyed before this instance of the |DataReductionProxyConfig|.
-  base::WeakPtr<DataReductionProxyService> data_reduction_proxy_service_;
-
   DISALLOW_COPY_AND_ASSIGN(DataReductionProxyConfig);
 };
 
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_test_utils.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_test_utils.cc
index f6e836c..dbbde52 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_test_utils.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_test_utils.cc
@@ -39,7 +39,6 @@ TestDataReductionProxyConfig::TestDataReductionProxyConfig(
     DataReductionProxyConfigurator* configurator,
     DataReductionProxyEventStore* event_store)
     : DataReductionProxyConfig(task_runner,
-                               task_runner,
                                net_log,
                                config_values.Pass(),
                                configurator,
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_test_utils.h b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_test_utils.h
index fba88ee..759b29c 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_test_utils.h
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_test_utils.h
@@ -116,6 +116,9 @@ class MockDataReductionProxyConfig : public TestDataReductionProxyConfig {
                      bool(const net::URLRequest& request,
                           const net::ProxyConfig& data_reduction_proxy_config,
                           base::TimeDelta* min_retry_delay));
+  MOCK_METHOD2(SecureProxyCheck,
+               void(const GURL& secure_proxy_check_url,
+                    FetcherResponseCallback fetcher_callback));
 
   // UpdateConfigurator should always call LogProxyState exactly once.
   void UpdateConfigurator(bool enabled,
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_unittest.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_unittest.cc
index 44746c1..7b61eed 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_unittest.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_config_unittest.cc
@@ -127,13 +127,11 @@ class DataReductionProxyConfigTest : public testing::Test {
             !config()->restricted_by_carrier_,
             request_succeeded && (response == "OK")),
         request_succeeded, 1);
-    MockDataReductionProxyService* service =
-        test_context_->mock_data_reduction_proxy_service();
     TestResponder responder;
     responder.response = response;
     responder.status =
         net::URLRequestStatus(net::URLRequestStatus::SUCCESS, net::OK);
-    EXPECT_CALL(*service, SecureProxyCheck(_, _))
+    EXPECT_CALL(*config(), SecureProxyCheck(_, _))
         .Times(1)
         .WillRepeatedly(testing::WithArgs<1>(
             testing::Invoke(&responder, &TestResponder::ExecuteCallback)));
@@ -161,9 +159,8 @@ class DataReductionProxyConfigTest : public testing::Test {
       scoped_ptr<DataReductionProxyParams> params) {
     params->EnableQuic(false);
     return make_scoped_ptr(new DataReductionProxyConfig(
-        test_context_->task_runner(), test_context_->task_runner(),
-        test_context_->net_log(), params.Pass(), test_context_->configurator(),
-        test_context_->event_store()));
+        test_context_->task_runner(), test_context_->net_log(), params.Pass(),
+        test_context_->configurator(), test_context_->event_store()));
   }
 
   MockDataReductionProxyConfig* config() {
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.cc
index 52340f7..9034bae 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.cc
@@ -58,12 +58,12 @@ DataReductionProxyIOData::DataReductionProxyIOData(
         DataReductionProxyMutableConfigValues::CreateFromParams(params.get());
     raw_mutable_config = mutable_config.get();
     config_.reset(new DataReductionProxyConfig(
-        io_task_runner_, ui_task_runner_, net_log, mutable_config.Pass(),
-        configurator_.get(), event_store_.get()));
+        io_task_runner_, net_log, mutable_config.Pass(), configurator_.get(),
+        event_store_.get()));
   } else {
-    config_.reset(new DataReductionProxyConfig(
-        io_task_runner_, ui_task_runner_, net_log, params.Pass(),
-        configurator_.get(), event_store_.get()));
+    config_.reset(
+        new DataReductionProxyConfig(io_task_runner_, net_log, params.Pass(),
+                                     configurator_.get(), event_store_.get()));
   }
 
   // It is safe to use base::Unretained here, since it gets executed
@@ -113,7 +113,6 @@ void DataReductionProxyIOData::SetDataReductionProxyService(
   DCHECK(ui_task_runner_->BelongsToCurrentThread());
   service_ = data_reduction_proxy_service;
   url_request_context_getter_ = service_->url_request_context_getter();
-  config()->SetDataReductionProxyService(data_reduction_proxy_service);
   // Using base::Unretained is safe here, unless the browser is being shut down
   // before the Initialize task can be executed. The task is only created as
   // part of class initialization.
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_service.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_service.cc
index 3c17aa2..1b90a14 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_service.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_service.cc
@@ -11,9 +11,6 @@
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_io_data.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_service_observer.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_settings.h"
-#include "net/base/load_flags.h"
-#include "net/url_request/url_fetcher.h"
-#include "net/url_request/url_request_status.h"
 
 namespace data_reduction_proxy {
 
@@ -109,47 +106,4 @@ DataReductionProxyService::GetWeakPtr() {
   return weak_factory_.GetWeakPtr();
 }
 
-void DataReductionProxyService::OnURLFetchComplete(
-    const net::URLFetcher* source) {
-  DCHECK(source == fetcher_.get());
-  net::URLRequestStatus status = source->GetStatus();
-
-  std::string response;
-  source->GetResponseAsString(&response);
-
-  fetcher_callback_.Run(response, status);
-}
-
-net::URLFetcher* DataReductionProxyService::GetURLFetcherForSecureProxyCheck(
-    const GURL& secure_proxy_check_url) {
-  net::URLFetcher* fetcher = net::URLFetcher::Create(
-      secure_proxy_check_url, net::URLFetcher::GET, this);
-  fetcher->SetLoadFlags(net::LOAD_DISABLE_CACHE | net::LOAD_BYPASS_PROXY);
-  DCHECK(url_request_context_getter_);
-  fetcher->SetRequestContext(url_request_context_getter_);
-  // Configure max retries to be at most kMaxRetries times for 5xx errors.
-  static const int kMaxRetries = 5;
-  fetcher->SetMaxRetriesOn5xx(kMaxRetries);
-  fetcher->SetAutomaticallyRetryOnNetworkChanges(kMaxRetries);
-  // The secure proxy check should not be redirected. Since the secure proxy
-  // check will inevitably fail if it gets redirected somewhere else (e.g. by a
-  // captive portal), short circuit that by giving up on the secure proxy check
-  // if it gets redirected.
-  fetcher->SetStopOnRedirect(true);
-  return fetcher;
-}
-
-void DataReductionProxyService::SecureProxyCheck(
-    const GURL& secure_proxy_check_url,
-    FetcherResponseCallback fetcher_callback) {
-  DCHECK(CalledOnValidThread());
-  net::URLFetcher* fetcher =
-      GetURLFetcherForSecureProxyCheck(secure_proxy_check_url);
-  if (!fetcher)
-    return;
-  fetcher_.reset(fetcher);
-  fetcher_callback_ = fetcher_callback;
-  fetcher_->Start();
-}
-
 }  // namespace data_reduction_proxy
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_service.h b/components/data_reduction_proxy/core/browser/data_reduction_proxy_service.h
index 0f9aed7..ed39307 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_service.h
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_service.h
@@ -14,7 +14,6 @@
 #include "base/single_thread_task_runner.h"
 #include "base/threading/non_thread_safe.h"
 #include "components/data_reduction_proxy/core/browser/data_reduction_proxy_metrics.h"
-#include "net/url_request/url_fetcher_delegate.h"
 
 class GURL;
 class PrefService;
@@ -25,16 +24,11 @@ class TimeDelta;
 }
 
 namespace net {
-class URLFetcher;
 class URLRequestContextGetter;
-class URLRequestStatus;
 }
 
 namespace data_reduction_proxy {
 
-typedef base::Callback<void(const std::string&, const net::URLRequestStatus&)>
-    FetcherResponseCallback;
-
 class DataReductionProxyCompressionStats;
 class DataReductionProxyIOData;
 class DataReductionProxyServiceObserver;
@@ -42,8 +36,7 @@ class DataReductionProxySettings;
 
 // Contains and initializes all Data Reduction Proxy objects that have a
 // lifetime based on the UI thread.
-class DataReductionProxyService : public base::NonThreadSafe,
-                                  public net::URLFetcherDelegate {
+class DataReductionProxyService : public base::NonThreadSafe {
  public:
   // The caller must ensure that |settings| and |request_context| remain alive
   // for the lifetime of the |DataReductionProxyService| instance. This instance
@@ -56,7 +49,7 @@ class DataReductionProxyService : public base::NonThreadSafe,
       net::URLRequestContextGetter* request_context_getter,
       scoped_refptr<base::SingleThreadTaskRunner> io_task_runner);
 
-  ~DataReductionProxyService() override;
+  virtual ~DataReductionProxyService();
 
   // Sets the DataReductionProxyIOData weak pointer.
   void SetIOData(base::WeakPtr<DataReductionProxyIOData> io_data);
@@ -67,12 +60,6 @@ class DataReductionProxyService : public base::NonThreadSafe,
   // final step in initialization.
   bool Initialized() const;
 
-  // Requests the given |secure_proxy_check_url|. Upon completion, returns the
-  // results to the caller via the |fetcher_callback|. Virtualized for unit
-  // testing.
-  virtual void SecureProxyCheck(const GURL& secure_proxy_check_url,
-                                FetcherResponseCallback fetcher_callback);
-
   // Constructs compression stats. This should not be called if a valid
   // compression stats is passed into the constructor.
   void EnableCompressionStatisticsLogging(
@@ -114,22 +101,9 @@ class DataReductionProxyService : public base::NonThreadSafe,
 
   base::WeakPtr<DataReductionProxyService> GetWeakPtr();
 
- protected:
-  // Virtualized for testing. Returns a fetcher to check if it is permitted to
-  // use the secure proxy.
-  virtual net::URLFetcher* GetURLFetcherForSecureProxyCheck(
-      const GURL& secure_proxy_check_url);
-
  private:
-  // net::URLFetcherDelegate:
-  void OnURLFetchComplete(const net::URLFetcher* source) override;
-
   net::URLRequestContextGetter* url_request_context_getter_;
 
-  // The URLFetcher being used for the secure proxy check.
-  scoped_ptr<net::URLFetcher> fetcher_;
-  FetcherResponseCallback fetcher_callback_;
-
   // Tracks compression statistics to be displayed to the user.
   scoped_ptr<DataReductionProxyCompressionStats> compression_stats_;
 
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings_unittest.cc b/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings_unittest.cc
index 0b404ad..1d64a4c 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings_unittest.cc
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_settings_unittest.cc
@@ -194,6 +194,18 @@ TEST(DataReductionProxySettingsStandaloneTest, TestEndToEndSecureProxyCheck) {
             .SkipSettingsInitialization()
             .Build();
 
+    // Enabling QUIC should have no effect since secure proxy should not
+    // use QUIC. If secure proxy check incorrectly uses QUIC, the tests will
+    // fail because Mock sockets do not speak QUIC.
+    scoped_ptr<net::HttpNetworkSession::Params> params(
+        new net::HttpNetworkSession::Params());
+    params->use_alternate_protocols = true;
+    params->enable_quic = true;
+    params->origin_to_force_quic_on = net::HostPortPair::FromString(
+        TestDataReductionProxyParams::DefaultSecureProxyCheckURL());
+
+    context.set_http_network_session_params(params.Pass());
+
     context.set_net_log(drp_test_context->net_log());
     net::MockClientSocketFactory mock_socket_factory;
     context.set_client_socket_factory(&mock_socket_factory);
diff --git a/components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.h b/components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.h
index 7b2add4..4993ffe 100644
--- a/components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.h
+++ b/components/data_reduction_proxy/core/browser/data_reduction_proxy_test_utils.h
@@ -156,9 +156,6 @@ class MockDataReductionProxyService : public DataReductionProxyService {
       scoped_refptr<base::SingleThreadTaskRunner> io_task_runner);
   ~MockDataReductionProxyService() override;
 
-  MOCK_METHOD2(SecureProxyCheck,
-      void(const GURL& secure_proxy_check_url,
-           FetcherResponseCallback fetcher_callback));
   MOCK_METHOD3(SetProxyPrefs,
                void(bool enabled, bool alternative_enabled, bool at_startup));
 };