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