Remove use of deprecated MessageLoop methods in chrome/.

chrome/browser/spellchecker/spellcheck_hunspell_dictionary.cc

 // 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.
 
 #include "chrome/browser/spellchecker/spellcheck_hunspell_dictionary.h"
 
 #include <stddef.h>
 
 #include <utility>
 
 #include "base/files/file_util.h"
+#include "base/location.h"
 #include "base/logging.h"
-#include "base/message_loop/message_loop.h"
 #include "base/path_service.h"
+#include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "chrome/browser/spellchecker/spellcheck_platform.h"
 #include "chrome/browser/spellchecker/spellcheck_service.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/spellcheck_common.h"
 #include "components/data_use_measurement/core/data_use_user_data.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/render_process_host.h"
 #include "net/base/load_flags.h"
 #include "net/url_request/url_fetcher.h"
@@ skipping 87 matching lines @@
 }
 
 void SpellcheckHunspellDictionary::Load() {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 
 #if defined(USE_BROWSER_SPELLCHECKER)
   if (spellcheck_platform::SpellCheckerAvailable() &&
       spellcheck_platform::PlatformSupportsLanguage(language_)) {
     use_browser_spellchecker_ = true;
     spellcheck_platform::SetLanguage(language_);
-    base::MessageLoop::current()->PostTask(FROM_HERE,
+    base::ThreadTaskRunnerHandle::Get()->PostTask(
+        FROM_HERE,
         base::Bind(
             &SpellcheckHunspellDictionary::InformListenersOfInitialization,
             weak_ptr_factory_.GetWeakPtr()));
     return;
   }
 #endif  // USE_BROWSER_SPELLCHECKER
 
 // Mac falls back on hunspell if its platform spellchecker isn't available.
 // However, Android does not support hunspell.
 #if !defined(OS_ANDROID)
@@ skipping 238 matching lines @@
   FOR_EACH_OBSERVER(Observer, observers_,
                     OnHunspellDictionaryInitialized(language_));
 }
 
 void SpellcheckHunspellDictionary::InformListenersOfDownloadFailure() {
   download_status_ = DOWNLOAD_FAILED;
   FOR_EACH_OBSERVER(Observer,
                     observers_,
                     OnHunspellDictionaryDownloadFailure(language_));
 }