Re-land "Convert native handles to buffers before encoding."

webrtc/video/video_encoder.cc

 /*
  *  Copyright (c) 2015 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 104 matching lines @@
     return fallback_encoder_->SetRates(bitrate, framerate);
   return ret;
 }
 
 void VideoEncoderSoftwareFallbackWrapper::OnDroppedFrame() {
   if (fallback_encoder_)
     return fallback_encoder_->OnDroppedFrame();
   return encoder_->OnDroppedFrame();
 }
 
+bool VideoEncoderSoftwareFallbackWrapper::SupportsNativeHandle() const {
+  if (fallback_encoder_)
+    return fallback_encoder_->SupportsNativeHandle();
+  return encoder_->SupportsNativeHandle();
+}
+
 }  // namespace webrtc