[Cast] Separate frame size from VideoSenderConfig in H264VideoToolboxEncoder.

media/cast/sender/h264_vt_encoder.h

Index: media/cast/sender/h264_vt_encoder.h
diff --git a/media/cast/sender/h264_vt_encoder.h b/media/cast/sender/h264_vt_encoder.h
index 116486245a4de05f1a8d800ed52620f9775d2808..eac1d5835f9268480e988ba8ee78a7190f73fa70 100644
--- a/media/cast/sender/h264_vt_encoder.h
+++ b/media/cast/sender/h264_vt_encoder.h
@@ -22,9 +22,11 @@ class H264VideoToolboxEncoder : public VideoEncoder {
   typedef VideoToolboxGlue::VTEncodeInfoFlags VTEncodeInfoFlags;
 
  public:
-  H264VideoToolboxEncoder(scoped_refptr<CastEnvironment> cast_environment,
-                          const VideoSenderConfig& video_config,
-                          const CastInitializationCallback& initialization_cb);
+  H264VideoToolboxEncoder(
+      const scoped_refptr<CastEnvironment>& cast_environment,
+      const VideoSenderConfig& video_config,
+      const gfx::Size& frame_size,
+      const CastInitializationCallback& initialization_cb);
   ~H264VideoToolboxEncoder() override;
 
   // media::cast::VideoEncoder implementation
@@ -39,7 +41,8 @@ class H264VideoToolboxEncoder : public VideoEncoder {
 
  private:
   // Initialize the compression session.
-  bool Initialize(const VideoSenderConfig& video_config);
+  bool Initialize(const VideoSenderConfig& video_config,
+                  const gfx::Size& frame_size);
 
   // Configure the compression session.
   void ConfigureSession(const VideoSenderConfig& video_config);