Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/formats/webm/webm_audio_client.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/formats/webm/webm_audio_client.h"
 
 #include "media/base/audio_decoder_config.h"
 #include "media/base/channel_layout.h"
 #include "media/formats/webm/webm_constants.h"
 
 namespace media {
 
-WebMAudioClient::WebMAudioClient(const scoped_refptr<MediaLog>& media_log)
-    : media_log_(media_log) {
+WebMAudioClient::WebMAudioClient(MediaLog* media_log) : media_log_(media_log) {
   Reset();
 }
 
 WebMAudioClient::~WebMAudioClient() {
 }
 
 void WebMAudioClient::Reset() {
   channels_ = -1;
   samples_per_second_ = -1;
   output_samples_per_second_ = -1;
@@ skipping 97 matching lines @@
                                  << " specified (" << *dst << " and " << val
                                  << ")";
     return false;
   }
 
   *dst = val;
   return true;
 }
 
 }  // namespace media