Revert of 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 dcce32d8331649ab0ec965b66392ae9e9ca249aa..5b2d2586b156fd5cc68840ca5a28619c76ec7690 100644
--- a/webrtc/sdk/objc/Framework/Classes/RTCVideoFrame.mm
+++ b/webrtc/sdk/objc/Framework/Classes/RTCVideoFrame.mm
@@ -11,8 +11,6 @@
 #import "RTCVideoFrame+Private.h"
 
 #include <memory>
-
-#include "webrtc/media/engine/webrtcvideoframe.h"
 
 @implementation RTCVideoFrame {
   std::unique_ptr<cricket::VideoFrame> _videoFrame;
@@ -107,10 +105,7 @@
   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;
 }