Topsites become keyedService based.

chrome/browser/history/top_sites_factory.cc

+// Copyright 2014 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/history/top_sites_factory.h"
+
+#include "chrome/browser/history/top_sites_impl.h"
+#include "chrome/browser/profiles/profile.h"
+#include "chrome/common/chrome_constants.h"
+#include "components/keyed_service/content/browser_context_dependency_manager.h"
+
+using namespace history;
+
+// static
+scoped_refptr<history::TopSites> TopSitesFactory::GetForProfile(
+    Profile* profile) {
+  return static_cast<history::TopSites*>(
+      GetInstance()->GetServiceForBrowserContext(profile, true).get());
+}
+
+// static
+scoped_refptr<history::TopSites> TopSitesFactory::GetForProfileIfExists(
+    Profile* profile) {
+  return static_cast<history::TopSites*>(
+      GetInstance()->GetServiceForBrowserContext(profile, false).get());
+}
+
+// static
+TopSitesFactory* TopSitesFactory::GetInstance() {
+  return Singleton<TopSitesFactory>::get();
+}
+
+TopSitesFactory::TopSitesFactory()
+    : RefcountedBrowserContextKeyedServiceFactory(
+          "TopSitesService",
+          BrowserContextDependencyManager::GetInstance()) {
+}
+
+TopSitesFactory::~TopSitesFactory() {
+}
+
+scoped_refptr<RefcountedKeyedService>

[Bernhard Bauer, 2015/01/06 11:10:30]

Can you move this above the constructor and destructor, so it matches the order
in the header?

[Jitu( very slow this week), 2015/01/08 09:38:25]

Done.

+TopSitesFactory::BuildServiceInstanceFor(
+    content::BrowserContext* profile) const {
+  TopSitesImpl* top_sites = new TopSitesImpl(static_cast<Profile*>(profile));
+  top_sites->Init(profile->GetPath().Append(chrome::kTopSitesFilename));
+  return scoped_refptr<history::TopSites>(top_sites);
+}