Fix memory leak in VideoToolbox encoder.

webrtc/sdk/objc/Framework/Classes/VideoToolbox/nalu_rewriter.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 15 matching lines @@
 namespace webrtc {
 
 // Converts a sample buffer emitted from the VideoToolbox encoder into a buffer
 // suitable for RTP. The sample buffer is in avcc format whereas the rtp buffer
 // needs to be in Annex B format. Data is written directly to |annexb_buffer|
 // and a new RTPFragmentationHeader is returned in |out_header|.
 bool H264CMSampleBufferToAnnexBBuffer(
     CMSampleBufferRef avcc_sample_buffer,
     bool is_keyframe,
     rtc::Buffer* annexb_buffer,
-    webrtc::RTPFragmentationHeader** out_header);
+    std::unique_ptr<RTPFragmentationHeader> *out_header);
 
 // Converts a buffer received from RTP into a sample buffer suitable for the
 // VideoToolbox decoder. The RTP buffer is in annex b format whereas the sample
 // buffer is in avcc format.
 // If |is_keyframe| is true then |video_format| is ignored since the format will
 // be read from the buffer. Otherwise |video_format| must be provided.
 // Caller is responsible for releasing the created sample buffer.
 bool H264AnnexBBufferToCMSampleBuffer(const uint8_t* annexb_buffer,
                                       size_t annexb_buffer_size,
                                       CMVideoFormatDescriptionRef video_format,
@@ skipping 56 matching lines @@
 
  private:
   uint8_t* const start_;
   size_t offset_;
   const size_t length_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_SDK_OBJC_FRAMEWORK_CLASSES_VIDEOTOOLBOX_NALU_REWRITER_H_