Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/filters/ffmpeg_audio_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_audio_decoder.h"
 
 #include <stdint.h>
 
 #include "base/callback_helpers.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 43 matching lines @@
 
 // Called by FFmpeg's allocation routine to free a buffer. |opaque| is the
 // AudioBuffer allocated, so unref it.
 static void ReleaseAudioBufferImpl(void* opaque, uint8_t* data) {
   if (opaque)
     static_cast<AudioBuffer*>(opaque)->Release();
 }
 
 FFmpegAudioDecoder::FFmpegAudioDecoder(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
-    const scoped_refptr<MediaLog>& media_log)
+    MediaLog* media_log)
     : task_runner_(task_runner),
       state_(kUninitialized),
       av_sample_format_(0),
       media_log_(media_log),
       pool_(new AudioBufferMemoryPool()) {}
 
 FFmpegAudioDecoder::~FFmpegAudioDecoder() {
   DCHECK(task_runner_->BelongsToCurrentThread());
 
   if (state_ != kUninitialized)
@@ skipping 375 matching lines @@
   // Now create an AVBufferRef for the data just allocated. It will own the
   // reference to the AudioBuffer object.
   AudioBuffer* opaque = buffer.get();
   opaque->AddRef();
   frame->buf[0] = av_buffer_create(frame->data[0], buffer_size_in_bytes,
                                    ReleaseAudioBufferImpl, opaque, 0);
   return 0;
 }
 
 }  // namespace media