Remove all remaining traces of MessageLoopProxy.

chrome/browser/search/suggestions/suggestions_service_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/search/suggestions/suggestions_service_factory.h"
 
 #include <memory>
 #include <utility>
 
 #include "base/memory/ptr_util.h"
@@ skipping 73 matching lines @@
 
   base::FilePath database_dir(
       profile->GetPath().Append(FILE_PATH_LITERAL("Thumbnails")));
 
   std::unique_ptr<ImageFetcherImpl> image_fetcher(
       new ImageFetcherImpl(
           base::MakeUnique<suggestions::ImageDecoderImpl>(),
           profile->GetRequestContext()));
   std::unique_ptr<ImageManager> thumbnail_manager(new ImageManager(
       std::move(image_fetcher), std::move(db), database_dir,
-      BrowserThread::GetMessageLoopProxyForThread(BrowserThread::DB)));
+      BrowserThread::GetTaskRunnerForThread(BrowserThread::DB)));
   return new SuggestionsService(
       signin_manager, token_service, sync_service, profile->GetRequestContext(),
       std::move(suggestions_store), std::move(thumbnail_manager),
       std::move(blacklist_store));
 }
 
 void SuggestionsServiceFactory::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* registry) {
   SuggestionsService::RegisterProfilePrefs(registry);
 }
 
 }  // namespace suggestions