Use texture-backed VideoFrane pipeline for Aura desktop capturing.

content/renderer/media/webrtc/webrtc_video_sink_adapter.cc

Index: content/renderer/media/webrtc/webrtc_video_sink_adapter.cc
diff --git a/content/renderer/media/webrtc/webrtc_video_sink_adapter.cc b/content/renderer/media/webrtc/webrtc_video_sink_adapter.cc
index 587ecfe6d1887a1fac89a5934a32ecd3c4f92e0e..46f2f4a6372a82d6d7614ee8751d9df9d3371a60 100644
--- a/content/renderer/media/webrtc/webrtc_video_sink_adapter.cc
+++ b/content/renderer/media/webrtc/webrtc_video_sink_adapter.cc
@@ -50,9 +50,7 @@ void WebRtcVideoSinkAdapter::RenderFrame(const cricket::VideoFrame* frame) {
 
   scoped_refptr<media::VideoFrame> video_frame;
   if (frame->GetNativeHandle() != NULL) {
-    NativeHandleImpl* handle =
-        static_cast<NativeHandleImpl*>(frame->GetNativeHandle());
-    video_frame = static_cast<media::VideoFrame*>(handle->GetHandle());
+    video_frame = static_cast<media::VideoFrame*>(frame->GetNativeHandle());
     video_frame->SetTimestamp(timestamp);
   } else {
     gfx::Size size(frame->GetWidth(), frame->GetHeight());