Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/filters/decrypting_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/decrypting_audio_decoder.h"
 
 #include <stdint.h>
 
 #include <cstdlib>
 
@@ skipping 18 matching lines @@
                                const base::TimeDelta& timestamp_2) {
   // Out of sync of 100ms would be pretty noticeable and we should keep any
   // drift below that.
   const int64_t kOutOfSyncThresholdInMilliseconds = 100;
   return std::abs(timestamp_1.InMilliseconds() - timestamp_2.InMilliseconds()) >
          kOutOfSyncThresholdInMilliseconds;
 }
 
 DecryptingAudioDecoder::DecryptingAudioDecoder(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
-    const scoped_refptr<MediaLog>& media_log,
+    MediaLog* media_log,
     const base::Closure& waiting_for_decryption_key_cb)
     : task_runner_(task_runner),
       media_log_(media_log),
       state_(kUninitialized),
       waiting_for_decryption_key_cb_(waiting_for_decryption_key_cb),
       decryptor_(NULL),
       key_added_while_decode_pending_(false),
       weak_factory_(this) {}
 
 std::string DecryptingAudioDecoder::GetDisplayName() const {
@@ skipping 300 matching lines @@
     }
 
     frame->set_timestamp(current_time);
     timestamp_helper_->AddFrames(frame->frame_count());
 
     output_cb_.Run(frame);
   }
 }
 
 }  // namespace media