Use FFmpegVideoDecoder from a UtilityProcess

media/filters/ffmpeg_video_decoder.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.
 
 #ifndef MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_
 #define MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_
 
 #include <list>
 #include <memory>
 
@@ skipping 34 matching lines @@
               const DecodeCB& decode_cb) override;
   void Reset(const base::Closure& closure) override;
 
   // Callback called from within FFmpeg to allocate a buffer based on
   // the dimensions of |codec_context|. See AVCodecContext.get_buffer2
   // documentation inside FFmpeg.
   int GetVideoBuffer(struct AVCodecContext* codec_context,
                      AVFrame* frame,
                      int flags);
 
+  void SetVideoFramePoolDelegate(

[sandersd (OOO until July 31), 2016/12/15 00:38:01]

This should also be a constructor parameter.

+      std::unique_ptr<VideoFramePoolDelegate> delegate);
+
  private:
   enum DecoderState {
     kUninitialized,
     kNormal,
     kDecodeFinished,
     kError
   };
 
   // Handles decoding an unencrypted encoded buffer.
   bool FFmpegDecode(const scoped_refptr<DecoderBuffer>& buffer,
@@ skipping 22 matching lines @@
   VideoFramePool frame_pool_;
 
   bool decode_nalus_;
 
   DISALLOW_COPY_AND_ASSIGN(FFmpegVideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_VIDEO_DECODER_H_