[Sync] Fix namespaces for the browser_sync component.

chrome/browser/chromeos/extensions/wallpaper_private_api.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 "chrome/browser/chromeos/extensions/wallpaper_private_api.h"
 
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 350 matching lines @@
   dict->SetBoolean("isOEMDefaultWallpaper", IsOEMDefaultWallpaper());
   dict->SetString("canceledWallpaper",
                   wallpaper_api_util::kCancelWallpaperMessage);
 
   return RespondNow(OneArgument(std::move(dict)));
 }
 
 ExtensionFunction::ResponseAction
 WallpaperPrivateGetSyncSettingFunction::Run() {
   Profile* profile =  Profile::FromBrowserContext(browser_context());
-  ProfileSyncService* sync =
+  browser_sync::ProfileSyncService* sync =
       ProfileSyncServiceFactory::GetInstance()->GetForProfile(profile);
   std::unique_ptr<base::DictionaryValue> dict(new base::DictionaryValue());
   dict->SetBoolean("syncThemes",
                    sync->GetActiveDataTypes().Has(syncer::THEMES));
   return RespondNow(OneArgument(std::move(dict)));
 }
 
 WallpaperPrivateSetWallpaperIfExistsFunction::
     WallpaperPrivateSetWallpaperIfExistsFunction() {}
 
@@ skipping 587 matching lines @@
 WallpaperPrivateRecordWallpaperUMAFunction::Run() {
   std::unique_ptr<record_wallpaper_uma::Params> params(
       record_wallpaper_uma::Params::Create(*args_));
   EXTENSION_FUNCTION_VALIDATE(params);
 
   user_manager::User::WallpaperType source = getWallpaperType(params->source);
   UMA_HISTOGRAM_ENUMERATION("Ash.Wallpaper.Source", source,
                             user_manager::User::WALLPAPER_TYPE_COUNT);
   return RespondNow(NoArguments());
 }