Revert of [media] Replace MessageLoopProxy usage with ThreadTaskRunnerHandle

media/video/capture/linux/video_capture_device_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 "media/video/capture/linux/video_capture_device_chromeos.h"
 
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
-#include "base/single_thread_task_runner.h"
-#include "base/thread_task_runner_handle.h"
+#include "base/message_loop/message_loop_proxy.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/display_observer.h"
 #include "ui/gfx/screen.h"
 
 namespace media {
 
 // This is a delegate class used to transfer Display change events from the UI
 // thread to the media thread.
 class VideoCaptureDeviceChromeOS::ScreenObserverDelegate
     : public gfx::DisplayObserver,
       public base::RefCountedThreadSafe<ScreenObserverDelegate> {
  public:
   ScreenObserverDelegate(
       VideoCaptureDeviceChromeOS* capture_device,
       scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner)
       : capture_device_(capture_device),
         ui_task_runner_(ui_task_runner),
-        capture_task_runner_(base::ThreadTaskRunnerHandle::Get()) {
+        capture_task_runner_(base::MessageLoopProxy::current()) {
     ui_task_runner_->PostTask(
         FROM_HERE,
         base::Bind(&ScreenObserverDelegate::AddObserverOnUIThread, this));
   }
 
   void RemoveObserver() {
     DCHECK(capture_task_runner_->BelongsToCurrentThread());
     capture_device_ = NULL;
     ui_task_runner_->PostTask(
         FROM_HERE,
@@ skipping 67 matching lines @@
   screen_observer_delegate_->RemoveObserver();
 }
 
 void VideoCaptureDeviceChromeOS::SetDisplayRotation(
     const gfx::Display& display) {
   if (display.IsInternal())
     SetRotation(display.rotation() * 90);
 }
 
 }  // namespace media