Move ExtensionPrefs and friends to extensions/ directory.

apps/app_restore_service_browsertest.cc

 // Copyright (c) 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/app_restore_service.h"
 #include "apps/app_restore_service_factory.h"
 #include "apps/saved_files_service.h"
 #include "chrome/browser/apps/app_browsertest_util.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/extensions/api/file_system/file_system_api.h"
-#include "chrome/browser/extensions/extension_prefs.h"
 #include "chrome/browser/extensions/extension_test_message_listener.h"
 #include "chrome/browser/profiles/profile.h"
 #include "content/public/browser/notification_service.h"
 #include "content/public/test/test_utils.h"
+#include "extensions/browser/extension_prefs.h"
 #include "extensions/common/extension.h"
 
 using extensions::Extension;
 using extensions::ExtensionPrefs;
 using extensions::ExtensionSystem;
 using extensions::FileSystemChooseEntryFunction;
 
 // TODO(benwells): Move PlatformAppBrowserTest to apps namespace in apps
 // component.
 using extensions::PlatformAppBrowserTest;
@@ skipping 115 matching lines @@
         extension->id(), it->id, it->path, it->is_directory);
   }
 
   apps::AppRestoreServiceFactory::GetForProfile(browser()->profile())->
       HandleStartup(true);
 
   access_ok_listener.WaitUntilSatisfied();
 }
 
 }  // namespace apps