Remove message_loop_helpers.h and update the includes to point to the new location.

chrome/browser/webdata/web_data_service.h

 // 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.
 
 // Chromium settings and storage represent user-selected preferences and
 // information and MUST not be extracted, overwritten or modified except
 // through Chromium defined APIs.
 
 #ifndef CHROME_BROWSER_WEBDATA_WEB_DATA_SERVICE_H__
 #define CHROME_BROWSER_WEBDATA_WEB_DATA_SERVICE_H__
 #pragma once
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/file_path.h"
 #include "base/location.h"
-#include "base/message_loop_helpers.h"
 #include "base/memory/ref_counted.h"
+#include "base/sequenced_task_runner_helpers.h"
 #include "base/synchronization/lock.h"
 #include "chrome/browser/profiles/refcounted_profile_keyed_service.h"
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/browser/search_engines/template_url_id.h"
 #include "chrome/browser/webdata/keyword_table.h"
 #include "content/public/browser/browser_thread.h"
 #include "sql/init_status.h"
 
 class AutocompleteSyncableService;
 class AutofillChange;
@@ skipping 706 matching lines @@
   // result can be NULL, if no result is expected or if the database could
   // not be opened. The result object is destroyed after this call.
   virtual void OnWebDataServiceRequestDone(WebDataService::Handle h,
                                            const WDTypedResult* result) = 0;
 
  protected:
   virtual ~WebDataServiceConsumer() {}
 };
 
 #endif  // CHROME_BROWSER_WEBDATA_WEB_DATA_SERVICE_H__