Convert MediaLog from being ref counted to owned by WebMediaPlayer.

media/blink/webaudiosourceprovider_impl.h

 // Copyright 2013 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_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_
 #define MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_
 
 #include <stddef.h>
 
 #include <string>
@@ skipping 31 matching lines @@
 // All calls are protected by a lock.
 class MEDIA_BLINK_EXPORT WebAudioSourceProviderImpl
     : NON_EXPORTED_BASE(public blink::WebAudioSourceProvider),
       NON_EXPORTED_BASE(public SwitchableAudioRendererSink) {
  public:
   using CopyAudioCB = base::Callback<void(std::unique_ptr<AudioBus>,
                                           uint32_t frames_delayed,
                                           int sample_rate)>;
 
   WebAudioSourceProviderImpl(scoped_refptr<SwitchableAudioRendererSink> sink,
-                             scoped_refptr<MediaLog> media_log);
+                             MediaLog* media_log);
 
   // blink::WebAudioSourceProvider implementation.
   void SetClient(blink::WebAudioSourceProviderClient* client) override;
   void ProvideInput(const blink::WebVector<float*>& audio_data,
                     size_t number_of_frames) override;
 
   // RestartableAudioRendererSink implementation.
   void Initialize(const AudioParameters& params,
                   RenderCallback* renderer) override;
   void Start() override;
@@ skipping 37 matching lines @@
 
   // Where audio ends up unless overridden by |client_|.
   base::Lock sink_lock_;
   scoped_refptr<SwitchableAudioRendererSink> sink_;
   std::unique_ptr<AudioBus> bus_wrapper_;
 
   // An inner class acting as a T filter where actual data can be tapped.
   class TeeFilter;
   const std::unique_ptr<TeeFilter> tee_filter_;
 
-  const scoped_refptr<MediaLog> media_log_;
+  MediaLog* const media_log_;
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<WebAudioSourceProviderImpl> weak_factory_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(WebAudioSourceProviderImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BLINK_WEBAUDIOSOURCEPROVIDER_IMPL_H_