Make VEA client of command buffer; move sync. IPC to VDA/VEA::Initialize()

content/common/gpu/media/vaapi_video_decode_accelerator.h

 // 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.
 //
 // This file contains an implementation of VideoDecoderAccelerator
 // that utilizes hardware video decoder present on Intel CPUs.
 
 #ifndef CONTENT_COMMON_GPU_MEDIA_VAAPI_VIDEO_DECODE_ACCELERATOR_H_
 #define CONTENT_COMMON_GPU_MEDIA_VAAPI_VIDEO_DECODE_ACCELERATOR_H_
 
@@ skipping 250 matching lines @@
   bool finish_flush_pending_;
 
   // Decoder requested a new surface set and we are waiting for all the surfaces
   // to be returned before we can free them.
   bool awaiting_va_surfaces_recycle_;
 
   // Last requested number/resolution of output picture buffers.
   size_t requested_num_pics_;
   gfx::Size requested_pic_size_;
 
+  // The WeakPtrFactory for |weak_this_|.
+  base::WeakPtrFactory<VaapiVideoDecodeAccelerator> weak_this_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(VaapiVideoDecodeAccelerator);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_COMMON_GPU_MEDIA_VAAPI_VIDEO_DECODE_ACCELERATOR_H_