Add a command line option to turn off retry attempts to resolve host

chrome/browser/net/connection_tester.cc

 // Copyright (c) 2011 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.
 
 #include "chrome/browser/net/connection_tester.h"
 
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/message_loop.h"
@@ skipping 89 matching lines @@
 
  private:
   // Creates a host resolver for |experiment|. On success returns net::OK and
   // fills |host_resolver| with a new pointer. Otherwise returns a network
   // error code.
   int CreateHostResolver(
       ConnectionTester::HostResolverExperiment experiment,
       scoped_ptr<net::HostResolver>* host_resolver) {
     // Create a vanilla HostResolver that disables caching.
     const size_t kMaxJobs = 50u;
+    const size_t kMaxRetryAttempts = 4u;
     net::HostResolverImpl* impl =
-        new net::HostResolverImpl(NULL, NULL, kMaxJobs, NULL);
+        new net::HostResolverImpl(NULL, NULL, kMaxJobs, kMaxRetryAttempts,
+                                  NULL);
 
     host_resolver->reset(impl);
 
     // Modify it slightly based on the experiment being run.
     switch (experiment) {
       case ConnectionTester::HOST_RESOLVER_EXPERIMENT_PLAIN:
         return net::OK;
       case ConnectionTester::HOST_RESOLVER_EXPERIMENT_DISABLE_IPV6:
         impl->SetDefaultAddressFamily(net::ADDRESS_FAMILY_IPV4);
         return net::OK;
@@ skipping 328 matching lines @@
 
   // Notify the delegate of completion.
   delegate_->OnCompletedConnectionTestExperiment(current, result);
 
   if (remaining_experiments_.empty()) {
     delegate_->OnCompletedConnectionTestSuite();
   } else {
     StartNextExperiment();
   }
 }