Split ExtensionSystem interface from ExtensionSystemImpl implementation, part 1.

chrome/browser/sync/test/integration/sync_app_list_helper.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 "chrome/browser/sync/test/integration/sync_app_list_helper.h"
 
 #include "chrome/browser/extensions/extension_service.h"
-#include "chrome/browser/extensions/extension_system.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/test/integration/sync_datatype_helper.h"
 #include "chrome/browser/sync/test/integration/sync_test.h"
 #include "chrome/browser/ui/app_list/app_list_syncable_service.h"
 #include "chrome/browser/ui/app_list/app_list_syncable_service_factory.h"
 #include "chrome/common/extensions/sync_helper.h"
+#include "extensions/browser/extension_system.h"
 #include "ui/app_list/app_list_item.h"
 #include "ui/app_list/app_list_model.h"
 
 using app_list::AppListItemList;
 using app_list::AppListItem;
 using app_list::AppListSyncableService;
 using app_list::AppListSyncableServiceFactory;
 
 SyncAppListHelper* SyncAppListHelper::GetInstance() {
   SyncAppListHelper* instance = Singleton<SyncAppListHelper>::get();
@@ skipping 108 matching lines @@
     extensions::AppSorting* s =
         extensions::ExtensionSystem::Get(profile)->extension_service()->
         extension_prefs()->app_sorting();
     std::string id = item->id();
     VLOG(1)
         << "Item(" << i << "): " << item->ToDebugString()
         << " Page: " << s->GetPageOrdinal(id).ToDebugString().substr(0, 8)
         << " Item: " << s->GetAppLaunchOrdinal(id).ToDebugString().substr(0, 8);
   }
 }