Moved JsonPrefStore to use SequencedWorkerPool

chrome/test/base/testing_profile.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/test/base/testing_profile.h"
 
 #include "build/build_config.h"
 
 #include "base/base_paths.h"
 #include "base/command_line.h"
@@ skipping 460 matching lines @@
       content::NotificationService::AllSources());
   if (!HistoryServiceFactory::GetForProfile(this, Profile::EXPLICIT_ACCESS))
     GetTopSites()->HistoryLoaded();
   top_sites_loaded_observer.Wait();
 }
 
 FilePath TestingProfile::GetPath() {
   return profile_path_;
 }
 
+scoped_refptr<base::SequencedTaskRunner> TestingProfile::GetIOTaskRunner() {
+  return MessageLoop::current()->message_loop_proxy();
+}
+
 TestingPrefService* TestingProfile::GetTestingPrefService() {
   if (!prefs_.get())
     CreateTestingPrefService();
   DCHECK(testing_prefs_);
   return testing_prefs_;
 }
 
 TestingProfile* TestingProfile::AsTestingProfile() {
   return this;
 }
@@ skipping 337 matching lines @@
 scoped_ptr<TestingProfile> TestingProfile::Builder::Build() {
   DCHECK(!build_called_);
   build_called_ = true;
   return scoped_ptr<TestingProfile>(new TestingProfile(
       path_,
       delegate_,
       extension_policy_,
       pref_service_.Pass(),
       user_cloud_policy_manager_.Pass()));
 }