cricket::VideoFrame cleanup. New width() and height(). Deleted GetChroma* methods.

webrtc/media/engine/webrtcvideoframe.h

Index: webrtc/media/engine/webrtcvideoframe.h
diff --git a/webrtc/media/engine/webrtcvideoframe.h b/webrtc/media/engine/webrtcvideoframe.h
index ccdcf76f292b6ce7e9526d823ec3821f930452e2..0a24b1a4a505c7b07d4d525b91eccbb5471f4bb5 100644
--- a/webrtc/media/engine/webrtcvideoframe.h
+++ b/webrtc/media/engine/webrtcvideoframe.h
@@ -65,8 +65,9 @@ class WebRtcVideoFrame : public VideoFrame {
                      webrtc::VideoRotation rotation,
                      bool apply_rotation) override;
 
-  size_t GetWidth() const override;
-  size_t GetHeight() const override;
+  int width() const override;
+  int height() const override;
+
   const uint8_t* GetYPlane() const override;
   const uint8_t* GetUPlane() const override;
   const uint8_t* GetVPlane() const override;