Poll CanPredictNetworkActions in Predictor class.

chrome/browser/profiles/profile_impl.cc

 // Copyright (c) 2012 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/profiles/profile_impl.h"
 
 #include <vector>
 
 #include "base/bind.h"
 #include "base/callback.h"
@@ skipping 381 matching lines @@
   create_session_service_timer_.Start(FROM_HERE,
       TimeDelta::FromMilliseconds(kCreateSessionServiceDelayMS), this,
       &ProfileImpl::EnsureSessionServiceCreated);
 #endif
 
   // Determine if prefetch is enabled for this profile.
   // If not profile_manager is present, it means we are in a unittest.
   const CommandLine* command_line = CommandLine::ForCurrentProcess();
   predictor_ = chrome_browser_net::Predictor::CreatePredictor(
       !command_line->HasSwitch(switches::kDisablePreconnect),
+      !command_line->HasSwitch(switches::kDnsPrefetchDisable),
       g_browser_process->profile_manager() == NULL);
 
   // If we are creating the profile synchronously, then we should load the
   // policy data immediately.
   bool force_immediate_policy_load = (create_mode == CREATE_MODE_SYNCHRONOUS);
 #if defined(ENABLE_CONFIGURATION_POLICY)
   policy::BrowserPolicyConnector* connector =
       g_browser_process->browser_policy_connector();
   schema_registry_service_ =
       policy::SchemaRegistryServiceFactory::CreateForContext(
@@ skipping 909 matching lines @@
 ProfileImpl::CreateDomainReliabilityMonitor() {
   domain_reliability::DomainReliabilityService* service =
       domain_reliability::DomainReliabilityServiceFactory::GetInstance()->
           GetForBrowserContext(this);
   if (!service)
     return scoped_ptr<domain_reliability::DomainReliabilityMonitor>();
 
   return service->CreateMonitor(
       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
 }