Move ExtensionPrefs and friends to extensions/ directory.

apps/shell/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/shell_extensions_browser_client.h"
 
 #include "apps/shell/shell_app_sorting.h"
 #include "apps/shell/shell_extension_system.h"
 #include "base/prefs/pref_service.h"
 #include "base/prefs/pref_service_factory.h"
 #include "base/prefs/testing_pref_store.h"
-#include "chrome/browser/extensions/extension_prefs.h"
-#include "chrome/browser/extensions/extension_prefs_factory.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"
+#include "extensions/browser/extension_prefs_factory.h"
 
 using content::BrowserContext;
 
 namespace extensions {
 namespace {
 
 // See chrome::RegisterProfilePrefs() in chrome/browser/prefs/browser_prefs.cc
 void RegisterPrefs(user_prefs::PrefRegistrySyncable* registry) {
   ExtensionPrefs::RegisterProfilePrefs(registry);
 }
@@ skipping 102 matching lines @@
   depends_on.push_back(ExtensionPrefsFactory::GetInstance());
   return depends_on;
 }
 
 ExtensionSystem* ShellExtensionsBrowserClient::CreateExtensionSystem(
     BrowserContext* context) {
   return new ShellExtensionSystem(context);
 }
 
 }  // namespace extensions