Revert 273763 "Add garbage collection for shared extensions on C..."

trunk/src/chrome/browser/extensions/extension_garbage_collector_factory.cc

 // Copyright 2014 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/extension_garbage_collector_factory.h"
 
 #include "base/memory/singleton.h"
 #include "chrome/browser/extensions/extension_garbage_collector.h"
 #include "chrome/browser/extensions/extension_system_factory.h"
 #include "chrome/browser/extensions/install_tracker_factory.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "extensions/browser/extensions_browser_client.h"
 
-#if defined(OS_CHROMEOS)
-#include "chrome/browser/extensions/extension_garbage_collector_chromeos.h"
-#endif
-
 namespace extensions {
 
 // static
 ExtensionGarbageCollector*
 ExtensionGarbageCollectorFactory::GetForBrowserContext(
     content::BrowserContext* context) {
   return static_cast<ExtensionGarbageCollector*>(
       GetInstance()->GetServiceForBrowserContext(context, true));
 }
 
 // static
 ExtensionGarbageCollectorFactory*
 ExtensionGarbageCollectorFactory::GetInstance() {
   return Singleton<ExtensionGarbageCollectorFactory>::get();
 }
 
 ExtensionGarbageCollectorFactory::ExtensionGarbageCollectorFactory()
     : BrowserContextKeyedServiceFactory(
           "ExtensionGarbageCollector",
           BrowserContextDependencyManager::GetInstance()) {
   DependsOn(ExtensionsBrowserClient::Get()->GetExtensionSystemFactory());
   DependsOn(InstallTrackerFactory::GetInstance());
 }
 
 ExtensionGarbageCollectorFactory::~ExtensionGarbageCollectorFactory() {}
 
 // static
 KeyedService* ExtensionGarbageCollectorFactory::BuildInstanceFor(
     content::BrowserContext* context) {
-#if defined(OS_CHROMEOS)
-  return new ExtensionGarbageCollectorChromeOS(context);
-#else
   return new ExtensionGarbageCollector(context);
-#endif
 }
 
 KeyedService* ExtensionGarbageCollectorFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   return BuildInstanceFor(context);
 }
 
 bool ExtensionGarbageCollectorFactory::ServiceIsCreatedWithBrowserContext()
     const {
   return true;
 }
 
 bool ExtensionGarbageCollectorFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }
 
 }  // namespace extensions