Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/filters/ffmpeg_video_decoder.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/filters/ffmpeg_video_decoder.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <algorithm>
@@ skipping 95 matching lines @@
   if (opaque)
     static_cast<VideoFrame*>(opaque)->Release();
 }
 
 // static
 bool FFmpegVideoDecoder::IsCodecSupported(VideoCodec codec) {
   FFmpegGlue::InitializeFFmpeg();
   return avcodec_find_decoder(VideoCodecToCodecID(codec)) != nullptr;
 }
 
-FFmpegVideoDecoder::FFmpegVideoDecoder(scoped_refptr<MediaLog> media_log)
-    : media_log_(std::move(media_log)),
-      state_(kUninitialized),
-      decode_nalus_(false) {
+FFmpegVideoDecoder::FFmpegVideoDecoder(MediaLog* media_log)
+    : media_log_(media_log), state_(kUninitialized), decode_nalus_(false) {
   thread_checker_.DetachFromThread();
 }
 
 int FFmpegVideoDecoder::GetVideoBuffer(struct AVCodecContext* codec_context,
                                        AVFrame* frame,
                                        int flags) {
   // Don't use |codec_context_| here! With threaded decoding,
   // it will contain unsynchronized width/height/pix_fmt values,
   // whereas |codec_context| contains the current threads's
   // updated width/height/pix_fmt, which can change for adaptive
@@ skipping 304 matching lines @@
   if (!codec || avcodec_open2(codec_context_.get(), codec, NULL) < 0) {
     ReleaseFFmpegResources();
     return false;
   }
 
   av_frame_.reset(av_frame_alloc());
   return true;
 }
 
 }  // namespace media