Delete method cricket::VideoFrame::Copy.

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

Index: webrtc/sdk/objc/Framework/Classes/RTCVideoFrame.mm
diff --git a/webrtc/sdk/objc/Framework/Classes/RTCVideoFrame.mm b/webrtc/sdk/objc/Framework/Classes/RTCVideoFrame.mm
index 5b2d2586b156fd5cc68840ca5a28619c76ec7690..dcce32d8331649ab0ec965b66392ae9e9ca249aa 100644
--- a/webrtc/sdk/objc/Framework/Classes/RTCVideoFrame.mm
+++ b/webrtc/sdk/objc/Framework/Classes/RTCVideoFrame.mm
@@ -12,6 +12,8 @@
 
 #include <memory>
 
+#include "webrtc/media/engine/webrtcvideoframe.h"
+
 @implementation RTCVideoFrame {
   std::unique_ptr<cricket::VideoFrame> _videoFrame;
   rtc::scoped_refptr<webrtc::VideoFrameBuffer> _i420Buffer;
@@ -105,7 +107,10 @@
   if (self = [super init]) {
     // Keep a shallow copy of the video frame. The underlying frame buffer is
     // not copied.
-    _videoFrame.reset(nativeFrame->Copy());
+    _videoFrame.reset(new cricket::WebRtcVideoFrame(
+        nativeFrame->video_frame_buffer(),
+        nativeFrame->rotation(),
+        nativeFrame->timestamp_us()));
   }
   return self;
 }