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

content/common/gpu/media/v4l2_image_processor.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_V4L2_IMAGE_PROCESSOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_V4L2_IMAGE_PROCESSOR_H_
 
 #include <queue>
 #include <vector>
 
@@ skipping 115 matching lines @@
   gfx::Size output_allocated_size_;
 
   media::VideoFrame::Format input_format_;
   media::VideoFrame::Format output_format_;
   uint32 input_format_fourcc_;
   uint32 output_format_fourcc_;
 
   size_t input_planes_count_;
   size_t output_planes_count_;
 
-  // Our original calling task runner for the child thread.
-  const scoped_refptr<base::SingleThreadTaskRunner> child_task_runner_;
+  // Our original calling message loop for the child thread.
+  const scoped_refptr<base::MessageLoopProxy> child_message_loop_proxy_;
 
   // V4L2 device in use.
   scoped_refptr<V4L2Device> device_;
 
   // Thread to communicate with the device on.
   base::Thread device_thread_;
   // Thread used to poll the V4L2 for events only.
   base::Thread device_poll_thread_;
 
   // All the below members are to be accessed from device_thread_ only
@@ skipping 24 matching lines @@
 
   // Weak factory for producing weak pointers on the device_thread_
   base::WeakPtrFactory<V4L2ImageProcessor> device_weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(V4L2ImageProcessor);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_V4L2_IMAGE_PROCESSOR_H_