Unrevert r141537: Add extensions::StateStore and use that instead of

chrome/browser/extensions/test_extension_system.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/extensions/test_extension_system.h"
 
 #include "chrome/browser/extensions/api/alarms/alarm_manager.h"
 #include "chrome/browser/extensions/extension_devtools_manager.h"
 #include "chrome/browser/extensions/extension_event_router.h"
 #include "chrome/browser/extensions/extension_info_map.h"
@@ skipping 82 matching lines @@
 }
 
 ExtensionProcessManager* TestExtensionSystem::process_manager() {
   return extension_process_manager_.get();
 }
 
 extensions::AlarmManager* TestExtensionSystem::alarm_manager() {
   return alarm_manager_.get();
 }
 
+extensions::StateStore* TestExtensionSystem::state_store() {
+  return NULL;
+}
+
 ExtensionInfoMap* TestExtensionSystem::info_map() {
   return NULL;
 }
 
 extensions::LazyBackgroundTaskQueue*
 TestExtensionSystem::lazy_background_task_queue() {
   return NULL;
 }
 
 ExtensionMessageService* TestExtensionSystem::message_service() {
   return NULL;
 }
 
 ExtensionEventRouter* TestExtensionSystem::event_router() {
   return NULL;
 }
 
 extensions::RulesRegistryService*
 TestExtensionSystem::rules_registry_service() {
   return NULL;
 }
 
 // static
 ProfileKeyedService* TestExtensionSystem::Build(Profile* profile) {
   return new TestExtensionSystem(profile);
 }