Make cricket::VideoFrame inherit webrtc::VideoFrame.

webrtc/media/engine/webrtcvideoengine2.cc

Index: webrtc/media/engine/webrtcvideoengine2.cc
diff --git a/webrtc/media/engine/webrtcvideoengine2.cc b/webrtc/media/engine/webrtcvideoengine2.cc
index 5176c115b70d8224978abad1c1555e327c9e39e6..54c74073260820fcfa2ce3ff7539a1221a3f652b 100644
--- a/webrtc/media/engine/webrtcvideoengine2.cc
+++ b/webrtc/media/engine/webrtcvideoengine2.cc
@@ -2520,10 +2520,10 @@ void WebRtcVideoChannel2::WebRtcVideoReceiveStream::OnFrame(
     return;
   }
 
-  WebRtcVideoFrame render_frame(
-      frame.video_frame_buffer(), frame.rotation(),
-      frame.render_time_ms() * rtc::kNumNanosecsPerMicrosec, frame.timestamp());
-  sink_->OnFrame(render_frame);
+  sink_->OnFrame(
+      WebRtcVideoFrame(frame.video_frame_buffer(), frame.rotation(),
+                       frame.render_time_ms() * rtc::kNumNanosecsPerMicrosec,
+                       frame.timestamp()));
 }
 
 bool WebRtcVideoChannel2::WebRtcVideoReceiveStream::IsDefaultStream() const {