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

webrtc/media/base/videoframe.h

 /*
  *  Copyright (c) 2004 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 57 matching lines @@
                                     uint8_t* buffer,
                                     size_t size,
                                     int stride_rgb) const;
 
   // Tests if sample is valid.  Returns true if valid.
   static bool Validate(uint32_t fourcc,
                        int w,
                        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
 
 #endif  // WEBRTC_MEDIA_BASE_VIDEOFRAME_H_