H264VideoToolboxEncoder: Add support for native handles

webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_encoder.h

 /*
  *  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 38 matching lines @@
 
   void OnDroppedFrame() override;
   int SetChannelParameters(uint32_t packet_loss, int64_t rtt) override;
 
   int SetRates(uint32_t new_bitrate_kbit, uint32_t frame_rate) override;
 
   int Release() override;
 
   const char* ImplementationName() const override;
 
+  bool SupportsNativeHandle() const override;
+
   void OnEncodedFrame(OSStatus status,
                       VTEncodeInfoFlags info_flags,
                       CMSampleBufferRef sample_buffer,
                       CodecSpecificInfo codec_specific_info,
                       int32_t width,
                       int32_t height,
                       int64_t render_time_ms,
                       uint32_t timestamp,
                       VideoRotation rotation);
 
@@ skipping 16 matching lines @@
 
   rtc::CriticalSection quality_scaler_crit_;
   QualityScaler quality_scaler_ GUARDED_BY(quality_scaler_crit_);
   H264BitstreamParser h264_bitstream_parser_;
 };  // H264VideoToolboxEncoder
 
 }  // namespace webrtc
 
 #endif  // defined(WEBRTC_VIDEO_TOOLBOX_SUPPORTED)
 #endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_H264_H264_VIDEO_TOOLBOX_ENCODER_H_