Remove use of deprecated MessageLoop methods in chrome/.

chrome/browser/ui/ash/media_delegate_chromeos.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/ui/ash/media_delegate_chromeos.h"
 
 #include "ash/content/shell_content_state.h"
 #include "ash/shell.h"
 #include "ash/system/tray/system_tray_notifier.h"
-#include "base/message_loop/message_loop.h"
+#include "base/location.h"
+#include "base/single_thread_task_runner.h"
+#include "base/threading/thread_task_runner_handle.h"
 #include "chrome/browser/chromeos/extensions/media_player_api.h"
 #include "chrome/browser/chromeos/extensions/media_player_event_router.h"
 #include "chrome/browser/media/media_stream_capture_indicator.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/browser_window.h"
 #include "chrome/browser/ui/tabs/tab_strip_model.h"
 #include "content/public/browser/render_view_host.h"
 #include "content/public/browser/web_contents.h"
@@ skipping 126 matching lines @@
   content::BrowserContext* context =
       ash::ShellContentState::GetInstance()->GetBrowserContextByIndex(index);
   return GetMediaCaptureStateOfAllWebContents(context);
 }
 
 void MediaDelegateChromeOS::OnRequestUpdate(
     int render_process_id,
     int render_frame_id,
     content::MediaStreamType stream_type,
     const content::MediaRequestState state) {
-  base::MessageLoopForUI::current()->PostTask(
-      FROM_HERE,
-      base::Bind(&MediaDelegateChromeOS::NotifyMediaCaptureChange,
-                 weak_ptr_factory_.GetWeakPtr()));
+  base::ThreadTaskRunnerHandle::Get()->PostTask(
+      FROM_HERE, base::Bind(&MediaDelegateChromeOS::NotifyMediaCaptureChange,
+                            weak_ptr_factory_.GetWeakPtr()));
 }
 
 void MediaDelegateChromeOS::NotifyMediaCaptureChange() {
   ash::Shell::GetInstance()
       ->system_tray_notifier()
       ->NotifyMediaCaptureChanged();
 }