Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/filters/decoder_stream.cc

 // Copyright 2014 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/decoder_stream.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 28 matching lines @@
 
 template <>
 const char* GetTraceString<DemuxerStream::AUDIO>() {
   return "DecoderStream<AUDIO>::Decode";
 }
 
 template <DemuxerStream::Type StreamType>
 DecoderStream<StreamType>::DecoderStream(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     ScopedVector<Decoder> decoders,
-    const scoped_refptr<MediaLog>& media_log)
+    MediaLog* media_log)
     : traits_(media_log),
       task_runner_(task_runner),
       media_log_(media_log),
       state_(STATE_UNINITIALIZED),
       stream_(NULL),
       cdm_context_(nullptr),
       decoder_selector_(new DecoderSelector<StreamType>(task_runner,
                                                         std::move(decoders),
                                                         media_log)),
       decoded_frames_since_fallback_(0),
@@ skipping 722 matching lines @@
   }
 
   // The resetting process will be continued in OnDecoderReinitialized().
   ReinitializeDecoder();
 }
 
 template class DecoderStream<DemuxerStream::VIDEO>;
 template class DecoderStream<DemuxerStream::AUDIO>;
 
 }  // namespace media