Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/filters/decrypting_video_decoder.h

 // 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.
 
 #ifndef MEDIA_FILTERS_DECRYPTING_VIDEO_DECODER_H_
 #define MEDIA_FILTERS_DECRYPTING_VIDEO_DECODER_H_
 
 #include <stdint.h>
 
 #include "base/callback.h"
@@ skipping 15 matching lines @@
 class MediaLog;
 
 // Decryptor-based VideoDecoder implementation that can decrypt and decode
 // encrypted video buffers and return decrypted and decompressed video frames.
 // All public APIs and callbacks are trampolined to the |task_runner_| so
 // that no locks are required for thread safety.
 class MEDIA_EXPORT DecryptingVideoDecoder : public VideoDecoder {
  public:
   DecryptingVideoDecoder(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
-      const scoped_refptr<MediaLog>& media_log,
+      MediaLog* media_log,
       const base::Closure& waiting_for_decryption_key_cb);
   ~DecryptingVideoDecoder() override;
 
   // VideoDecoder implementation.
   std::string GetDisplayName() const override;
   void Initialize(const VideoDecoderConfig& config,
                   bool low_delay,
                   CdmContext* cdm_context,
                   const InitCB& init_cb,
                   const OutputCB& output_cb) override;
@@ skipping 29 matching lines @@
 
   // Callback for the |decryptor_| to notify this object that a new key has been
   // added.
   void OnKeyAdded();
 
   // Reset decoder and call |reset_cb_|.
   void DoReset();
 
   scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
 
-  scoped_refptr<MediaLog> media_log_;
+  MediaLog* media_log_;
 
   State state_;
 
   InitCB init_cb_;
   OutputCB output_cb_;
   DecodeCB decode_cb_;
   base::Closure reset_cb_;
   base::Closure waiting_for_decryption_key_cb_;
 
   VideoDecoderConfig config_;
@@ skipping 16 matching lines @@
 
   base::WeakPtr<DecryptingVideoDecoder> weak_this_;
   base::WeakPtrFactory<DecryptingVideoDecoder> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DecryptingVideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_DECRYPTING_VIDEO_DECODER_H_