Revert of Delete webrtc::VideoFrame methods buffer and stride.

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 36 matching lines @@
   virtual int32_t GetUPitch() const = 0;
   virtual int32_t GetVPitch() const = 0;
 
   // Returns the handle of the underlying video frame. This is used when the
   // frame is backed by a texture. The object should be destroyed when it is no
   // longer in use, so the underlying resource can be freed.
   virtual void* GetNativeHandle() const = 0;
 
   // Returns the underlying video frame buffer. This function is ok to call
   // multiple times, but the returned object will refer to the same memory.
-  // TODO(nisse): Change to return a const ref to a scoped_refptr, for
-  // consistency with webrtc::VideoFrame.
   virtual rtc::scoped_refptr<webrtc::VideoFrameBuffer> video_frame_buffer()
       const = 0;
 
   // System monotonic clock, same timebase as rtc::TimeMicros().
   virtual int64_t timestamp_us() const = 0;
   virtual void set_timestamp_us(int64_t time_us) = 0;
 
   // Deprecated methods, for backwards compatibility.
   // TODO(nisse): Delete when usage in Chrome and other applications
   // have been replaced.
@@ skipping 83 matching lines @@
   // 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_