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

chrome/browser/spellchecker/spellcheck_host_impl.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.
 
 #ifndef CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_HOST_IMPL_H_
 #define CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_HOST_IMPL_H_
 #pragma once
 
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/file_path.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
-#include "base/message_loop_helpers.h"
+#include "base/sequenced_task_runner_helpers.h"
 #include "chrome/browser/spellchecker/spellcheck_host.h"
 #include "chrome/browser/spellchecker/spellcheck_profile_provider.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "net/url_request/url_fetcher_delegate.h"
 
 namespace net {
 class URLFetcher;
 }  // namespace net
 
@@ skipping 144 matching lines @@
   SpellCheckHostMetrics* metrics_;
 
   base::WeakPtrFactory<SpellCheckHostImpl> weak_ptr_factory_;
 
   scoped_ptr<CustomWordList> custom_words_;
 
   DISALLOW_COPY_AND_ASSIGN(SpellCheckHostImpl);
 };
 
 #endif  // CHROME_BROWSER_SPELLCHECKER_SPELLCHECK_HOST_IMPL_H_