[Cast] VideoFrameFactory interface to vend frames with encoder affinity.

media/cast/sender/external_video_encoder.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 MEDIA_CAST_SENDER_EXTERNAL_VIDEO_ENCODER_H_
 #define MEDIA_CAST_SENDER_EXTERNAL_VIDEO_ENCODER_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "media/cast/cast_config.h"
@@ skipping 24 matching lines @@
   ~ExternalVideoEncoder() override;
 
   // VideoEncoder implementation.
   bool EncodeVideoFrame(
       const scoped_refptr<media::VideoFrame>& video_frame,
       const base::TimeTicks& reference_time,
       const FrameEncodedCallback& frame_encoded_callback) override;
   void SetBitRate(int new_bit_rate) override;
   void GenerateKeyFrame() override;
   void LatestFrameIdToReference(uint32 frame_id) override;
+  scoped_refptr<VideoFrameFactory> GetVideoFrameFactory() override;
 
   // Called when video_accelerator_client_ has finished creating the VEA and
   // is ready for use.
   void OnCreateVideoEncodeAccelerator(
       scoped_refptr<base::SingleThreadTaskRunner> encoder_task_runner);
 
  protected:
   // If |success| is true then encoder is initialized successfully.
   // Otherwise encoder initialization failed.
   void EncoderInitialized(bool success);
@@ skipping 18 matching lines @@
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<ExternalVideoEncoder> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ExternalVideoEncoder);
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_SENDER_EXTERNAL_VIDEO_ENCODER_H_