Remove RenderThreadImpl dependencies from WebMediaPlayerImpl.

media/filters/audio_renderer_impl.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.
 
 // Audio rendering unit utilizing an AudioRendererSink to output data.
 //
 // This class lives inside three threads during it's lifetime, namely:
 // 1. Render thread
 //    Where the object is created.
 // 2. Media thread (provided via constructor)
@@ skipping 46 matching lines @@
   //
   // |decoders| contains the AudioDecoders to use when initializing.
   //
   // |set_decryptor_ready_cb| is fired when the audio decryptor is available
   // (only applicable if the stream is encrypted and we have a decryptor).
   AudioRendererImpl(
       const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
       AudioRendererSink* sink,
       ScopedVector<AudioDecoder> decoders,
       const SetDecryptorReadyCB& set_decryptor_ready_cb,
-      AudioHardwareConfig* hardware_params);
+      const AudioHardwareConfig& hardware_params);
   virtual ~AudioRendererImpl();
 
   // TimeSource implementation.
   virtual void StartTicking() OVERRIDE;
   virtual void StopTicking() OVERRIDE;
   virtual void SetPlaybackRate(float rate) OVERRIDE;
   virtual void SetMediaTime(base::TimeDelta time) OVERRIDE;
   virtual base::TimeDelta CurrentMediaTime() OVERRIDE;
 
   // AudioRenderer implementation.
@@ skipping 121 matching lines @@
   bool expecting_config_changes_;
 
   // The sink (destination) for rendered audio. |sink_| must only be accessed
   // on |task_runner_|. |sink_| must never be called under |lock_| or else we
   // may deadlock between |task_runner_| and the audio callback thread.
   scoped_refptr<media::AudioRendererSink> sink_;
 
   scoped_ptr<AudioBufferStream> audio_buffer_stream_;
 
   // Interface to the hardware audio params.
-  const AudioHardwareConfig* const hardware_config_;
+  const AudioHardwareConfig& hardware_config_;
 
   // Cached copy of hardware params from |hardware_config_|.
   AudioParameters audio_parameters_;
 
   // Callbacks provided during Initialize().
   PipelineStatusCB init_cb_;
   TimeCB time_cb_;
   BufferingStateCB buffering_state_cb_;
   base::Closure ended_cb_;
   PipelineStatusCB error_cb_;
@@ skipping 35 matching lines @@
 
   // NOTE: Weak pointers must be invalidated before all other member variables.
   base::WeakPtrFactory<AudioRendererImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioRendererImpl);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_AUDIO_RENDERER_IMPL_H_