Add a webrtc{en,de}coderfactory implementation for VideoToolbox

webrtc/sdk/objc/Framework/Classes/h264_video_toolbox_nalu.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.
  *
  */
 
-#include "webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_nalu.h"
-
-#if defined(WEBRTC_VIDEO_TOOLBOX_SUPPORTED)
+#include "webrtc/sdk/objc/Framework/Classes/h264_video_toolbox_nalu.h"
 
 #include <CoreFoundation/CoreFoundation.h>
 #include <memory>
 #include <vector>
 
 #include "webrtc/base/checks.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/common_video/h264/h264_common.h"
 
 namespace webrtc {
@@ skipping 361 matching lines @@
   memcpy(start_ + offset_, data, data_size);
   offset_ += data_size;
   return true;
 }
 
 size_t AvccBufferWriter::BytesRemaining() const {
   return length_ - offset_;
 }
 
 }  // namespace webrtc
-
-#endif  // defined(WEBRTC_VIDEO_TOOLBOX_SUPPORTED)