Topsites become keyedService based.

chrome/browser/thumbnails/thumbnail_service_factory.cc

 // Copyright (c) 2012 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/thumbnails/thumbnail_service_factory.h"
 
 #include "base/logging.h"
+#include "chrome/browser/history/top_sites_factory.h"
 #include "chrome/browser/thumbnails/thumbnail_service.h"
 #include "chrome/browser/thumbnails/thumbnail_service_impl.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 
 using thumbnails::ThumbnailService;
 using thumbnails::ThumbnailServiceImpl;
 
 ThumbnailServiceFactory::ThumbnailServiceFactory()
     : RefcountedBrowserContextKeyedServiceFactory(
           "ThumbnailService",
           BrowserContextDependencyManager::GetInstance()) {
+  DependsOn(TopSitesFactory::GetInstance());
 }
 
 ThumbnailServiceFactory::~ThumbnailServiceFactory() {
 }
 
 // static
 scoped_refptr<ThumbnailService> ThumbnailServiceFactory::GetForProfile(
     Profile* profile) {
   return static_cast<ThumbnailService*>(
       GetInstance()->GetServiceForBrowserContext(profile, true).get());
 }
 
 // static
 ThumbnailServiceFactory* ThumbnailServiceFactory::GetInstance() {
   return Singleton<ThumbnailServiceFactory>::get();
 }
 
 scoped_refptr<RefcountedKeyedService>
 ThumbnailServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
   return scoped_refptr<RefcountedKeyedService>(
       new ThumbnailServiceImpl(static_cast<Profile*>(profile)));
 }