Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/filters/decoder_selector.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_selector.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/callback_helpers.h"
@@ skipping 26 matching lines @@
     case DemuxerStream::UNKNOWN:
       NOTREACHED();
   }
   return false;
 }
 
 template <DemuxerStream::Type StreamType>
 DecoderSelector<StreamType>::DecoderSelector(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     ScopedVector<Decoder> decoders,
-    const scoped_refptr<MediaLog>& media_log)
+    MediaLog* media_log)
     : task_runner_(task_runner),
       decoders_(std::move(decoders)),
       media_log_(media_log),
       input_stream_(nullptr),
       weak_ptr_factory_(this) {}
 
 template <DemuxerStream::Type StreamType>
 DecoderSelector<StreamType>::~DecoderSelector() {
   DVLOG(2) << __func__;
   DCHECK(task_runner_->BelongsToCurrentThread());
@@ skipping 181 matching lines @@
 
 // These forward declarations tell the compiler that we will use
 // DecoderSelector with these arguments, allowing us to keep these definitions
 // in our .cc without causing linker errors. This also means if anyone tries to
 // instantiate a DecoderSelector with anything but these two specializations
 // they'll most likely get linker errors.
 template class DecoderSelector<DemuxerStream::AUDIO>;
 template class DecoderSelector<DemuxerStream::VIDEO>;
 
 }  // namespace media