ExtensionSystem cleanup part 2

apps/shell/browser/shell_extensions_browser_client.cc

 // Copyright 2013 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 "apps/shell/browser/shell_extensions_browser_client.h"
 
 #include "apps/shell/browser/shell_app_sorting.h"
-#include "apps/shell/browser/shell_extension_system.h"
+#include "apps/shell/browser/shell_extension_system_factory.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/pref_service_factory.h"
 #include "base/prefs/testing_pref_store.h"
 #include "components/user_prefs/pref_registry_syncable.h"
 #include "components/user_prefs/user_prefs.h"
 #include "extensions/browser/app_sorting.h"
 #include "extensions/browser/extension_prefs.h"
 
 using content::BrowserContext;
 
@@ skipping 120 matching lines @@
   NOTREACHED();
   return NULL;
 }
 
 ApiActivityMonitor* ShellExtensionsBrowserClient::GetApiActivityMonitor(
     BrowserContext* context) {
   // app_shell doesn't monitor API function calls or events.
   return NULL;
 }
 
-std::vector<BrowserContextKeyedServiceFactory*>
-ShellExtensionsBrowserClient::GetExtensionSystemDependencies() {
-  return ShellExtensionSystem::GetDependencies();
-}
-
-ExtensionSystem* ShellExtensionsBrowserClient::CreateExtensionSystem(
-    BrowserContext* context) {
-  return new ShellExtensionSystem(context);
+ExtensionSystemProvider*
+ShellExtensionsBrowserClient::GetExtensionSystemFactory() {
+  return ShellExtensionSystemFactory::GetInstance();
 }
 
 }  // namespace extensions