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

net/url_request/url_request_unittest.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_URL_REQUEST_URL_REQUEST_UNITTEST_H_
 #define NET_URL_REQUEST_URL_REQUEST_UNITTEST_H_
 
 #include <stdlib.h>
 
 #include <sstream>
@@ skipping 113 matching lines @@
   ScopedRunnableMethodFactory<TestCookiePolicy> method_factory_;
   int options_;
   net::CompletionCallback* callback_;
 };
 
 //-----------------------------------------------------------------------------
 
 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);
     Init();
   }
 
   void set_cookie_policy(net::CookiePolicy* policy) {
     cookie_policy_ = policy;
   }
 
@@ skipping 611 matching lines @@
       return false;
 
     return true;
   }
 
  private:
   ~FTPTestServer() {}
 };
 
 #endif  // NET_URL_REQUEST_URL_REQUEST_UNITTEST_H_