Add a command line flag to change the default number of parallel DNS requests issued by chrome.

  --host-resolver-parallelism=XXX

This is a useful debugging tool, since for some users too many parallel DNS requests results in spurious DNS failures from their resolver.

BUG=44489
Review URL: http://codereview.chromium.org/3019007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@52802 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 4 insertions, 2 deletions

diff --git a/net/url_request/url_request_unittest.h b/net/url_request/url_request_unittest.h
index 0dfa766..f8fee49 100644
--- a/net/url_request/url_request_unittest.h
+++ b/net/url_request/url_request_unittest.h
@@ -131,13 +131,15 @@ class TestCookiePolicy : public net::CookiePolicy {
 class TestURLRequestContext : public URLRequestContext {
  public:
   TestURLRequestContext() {
-    host_resolver_ = net::CreateSystemHostResolver();
+    host_resolver_ =
+        net::CreateSystemHostResolver(net::HostResolver::kDefaultParallelism);
     proxy_service_ = net::ProxyService::CreateNull();
     Init();
   }
 
   explicit TestURLRequestContext(const std::string& proxy) {
-    host_resolver_ = net::CreateSystemHostResolver();
+    host_resolver_ =
+        net::CreateSystemHostResolver(net::HostResolver::kDefaultParallelism);
     net::ProxyConfig proxy_config;
     proxy_config.proxy_rules().ParseFromString(proxy);
     proxy_service_ = net::ProxyService::CreateFixed(proxy_config);