Enable MSVC warning for unused locals.

chrome/browser/ui/webui/sync_internals_message_handler.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/ui/webui/sync_internals_message_handler.h"
 
 #include <vector>
 
 #include "base/logging.h"
 #include "chrome/browser/profiles/profile.h"
@@ skipping 203 matching lines @@
   web_ui()->CallJavascriptFunction(
       "chrome.sync.dispatchEvent",
       base::StringValue("onAboutInfoUpdated"),
       *value);
 }
 
 // Gets the ProfileSyncService of the underlying original profile.
 // May return NULL (e.g., if sync is disabled on the command line).
 ProfileSyncService* SyncInternalsMessageHandler::GetProfileSyncService() {
   Profile* profile = Profile::FromWebUI(web_ui());
-  ProfileSyncServiceFactory* factory = ProfileSyncServiceFactory::GetInstance();
-  return factory->GetForProfile(profile->GetOriginalProfile());
+  return ProfileSyncServiceFactory::GetForProfile(
+      profile->GetOriginalProfile());
 }