[Cast] Software encoder support for varying video frame sizes.

media/cast/sender/fake_software_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_FAKE_SOFTWARE_VIDEO_ENCODER_H_
 #define MEDIA_CAST_SENDER_FAKE_SOFTWARE_VIDEO_ENCODER_H_
 
 #include "media/cast/cast_config.h"
 #include "media/cast/sender/software_video_encoder.h"
+#include "ui/gfx/geometry/size.h"
 
 namespace media {
 namespace cast {
 
 class FakeSoftwareVideoEncoder : public SoftwareVideoEncoder {
  public:
   FakeSoftwareVideoEncoder(const VideoSenderConfig& video_config);
   ~FakeSoftwareVideoEncoder() override;
 
   // SoftwareVideoEncoder implementations.
   void Initialize() override;
   void Encode(const scoped_refptr<media::VideoFrame>& video_frame,
               const base::TimeTicks& reference_time,
               EncodedFrame* encoded_frame) override;
   void UpdateRates(uint32 new_bitrate) override;
   void GenerateKeyFrame() override;
   void LatestFrameIdToReference(uint32 frame_id) override;
 
  private:
   VideoSenderConfig video_config_;
+  gfx::Size last_frame_size_;
   bool next_frame_is_key_;
   uint32 frame_id_;
   uint32 frame_id_to_reference_;
   int frame_size_;
 };
 
 }  // namespace cast
 }  // namespace media
 
 #endif  // MEDIA_CAST_SENDER_FAKE_SOFTWARE_VIDEO_ENCODER_H_