Revert of content/common: Remove use of MessageLoopProxy and deprecated MessageLoop APIs

content/common/gpu/media/vaapi_video_encode_accelerator.h

 // 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.
 
 #ifndef CONTENT_COMMON_GPU_MEDIA_VAAPI_VIDEO_ENCODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_VAAPI_VIDEO_ENCODE_ACCELERATOR_H_
 
 #include <list>
 #include <queue>
 
@@ skipping 217 matching lines @@
   std::queue<linked_ptr<InputFrameRef> > encoder_input_queue_;
 
   // BitstreamBuffers mapped, ready to be filled.
   std::queue<linked_ptr<BitstreamBufferRef> > available_bitstream_buffers_;
 
   // Jobs submitted for encode, awaiting bitstream buffers to become available.
   std::queue<linked_ptr<EncodeJob> > submitted_encode_jobs_;
 
   // Encoder thread. All tasks are executed on it.
   base::Thread encoder_thread_;
-  scoped_refptr<base::SingleThreadTaskRunner> encoder_thread_task_runner_;
+  scoped_refptr<base::MessageLoopProxy> encoder_thread_proxy_;
 
-  const scoped_refptr<base::SingleThreadTaskRunner> child_task_runner_;
+  const scoped_refptr<base::MessageLoopProxy> child_message_loop_proxy_;
 
   // To expose client callbacks from VideoEncodeAccelerator.
   // NOTE: all calls to these objects *MUST* be executed on
-  // child_task_runner_.
+  // child_message_loop_proxy_.
   scoped_ptr<base::WeakPtrFactory<Client> > client_ptr_factory_;
   base::WeakPtr<Client> client_;
 
   // WeakPtr to post from the encoder thread back to the ChildThread, as it may
   // outlive this. Posting from the ChildThread using base::Unretained(this)
   // to the encoder thread is safe, because |this| always outlives the encoder
   // thread (it's a member of this class).
   base::WeakPtr<VaapiVideoEncodeAccelerator> weak_this_;
   base::WeakPtrFactory<VaapiVideoEncodeAccelerator> weak_this_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(VaapiVideoEncodeAccelerator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_VAAPI_VIDEO_ENCODE_ACCELERATOR_H_