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

chrome/browser/extensions/extension_data_deleter.h

 // Copyright (c) 2011 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.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_DATA_DELETER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_DATA_DELETER_H_
 #pragma once
 
 #include "base/file_path.h"
 #include "base/memory/ref_counted.h"
-#include "base/message_loop_helpers.h"
+#include "base/sequenced_task_runner_helpers.h"
 #include "base/string16.h"
 #include "content/public/browser/browser_thread.h"
 #include "googleurl/src/gurl.h"
 
 namespace content {
 class DOMStorageContext;
 class IndexedDBContext;
 class ResourceContext;
 }
 
@@ skipping 79 matching lines @@
   scoped_refptr<fileapi::FileSystemContext> file_system_context_;
 
   // If non-empty, the extension we're deleting is an isolated app, and this
   // is its directory which we should delete.
   FilePath isolated_app_path_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionDataDeleter);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_DATA_DELETER_H_