Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/formats/webm/webm_video_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_video_client.h"
 
 #include "media/base/video_decoder_config.h"
 #include "media/formats/webm/webm_constants.h"
 
 namespace media {
 
-WebMVideoClient::WebMVideoClient(const scoped_refptr<MediaLog>& media_log)
-    : media_log_(media_log) {
+WebMVideoClient::WebMVideoClient(MediaLog* media_log) : media_log_(media_log) {
   Reset();
 }
 
 WebMVideoClient::~WebMVideoClient() {
 }
 
 void WebMVideoClient::Reset() {
   pixel_width_ = -1;
   pixel_height_ = -1;
   crop_bottom_ = -1;
@@ skipping 149 matching lines @@
   // Accept binary fields we don't care about for now.
   return true;
 }
 
 bool WebMVideoClient::OnFloat(int id, double val) {
   // Accept float fields we don't care about for now.
   return true;
 }
 
 }  // namespace media