Cleanups in cricket::VideoFrame and cricket::WebRtcVideoFrame.

webrtc/media/base/videoframe.h

Index: webrtc/media/base/videoframe.h
diff --git a/webrtc/media/base/videoframe.h b/webrtc/media/base/videoframe.h
index 4015f906f93c4ee0894d7a7167f4d62bf1b7b7bb..ef43f5222994d3ed3d363d67e640c8518705bcb5 100644
--- a/webrtc/media/base/videoframe.h
+++ b/webrtc/media/base/videoframe.h
@@ -75,14 +75,6 @@ class VideoFrame {
                        int h,
                        const uint8_t* sample,
                        size_t sample_size);
-
- protected:
-  // Creates an empty frame.
-  virtual VideoFrame* CreateEmptyFrame(int w,
-                                       int h,
-                                       int64_t timestamp_us) const = 0;
-
-  virtual void set_rotation(webrtc::VideoRotation rotation) = 0;
 };
 
 }  // namespace cricket