Revert of Delete method cricket::VideoFrame::Copy.

webrtc/sdk/objc/Framework/Classes/RTCVideoFrame.mm

 /*
  *  Copyright 2015 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.
  */
 
 #import "RTCVideoFrame+Private.h"
 
 #include <memory>
 
-#include "webrtc/media/engine/webrtcvideoframe.h"
-
 @implementation RTCVideoFrame {
   std::unique_ptr<cricket::VideoFrame> _videoFrame;
   rtc::scoped_refptr<webrtc::VideoFrameBuffer> _i420Buffer;
 }
 
 - (size_t)width {
   return _videoFrame->width();
 }
 
 - (size_t)height {
@@ skipping 73 matching lines @@
     }
   }
 }
 
 #pragma mark - Private
 
 - (instancetype)initWithNativeFrame:(const cricket::VideoFrame *)nativeFrame {
   if (self = [super init]) {
     // Keep a shallow copy of the video frame. The underlying frame buffer is
     // not copied.
-    _videoFrame.reset(new cricket::WebRtcVideoFrame(
-        nativeFrame->video_frame_buffer(),
-        nativeFrame->rotation(),
-        nativeFrame->timestamp_us()));
+    _videoFrame.reset(nativeFrame->Copy());
   }
   return self;
 }
 
 - (rtc::scoped_refptr<webrtc::VideoFrameBuffer>)i420Buffer {
   [self convertBufferIfNeeded];
   return _i420Buffer;
 }
 
 @end