Make AudioParameters a class instead of a struct

content/renderer/media/audio_device.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 audio output stream provided by browser
 // process through IPC.
 //
 // Relationship of classes.
 //
 //  AudioOutputController                AudioDevice
@@ skipping 68 matching lines @@
 class CONTENT_EXPORT AudioDevice
     : NON_EXPORTED_BASE(public media::AudioRendererSink),
       public AudioMessageFilter::Delegate,
       NON_EXPORTED_BASE(public ScopedLoopObserver) {
  public:
   // Methods called on main render thread -------------------------------------
 
   // Minimal constructor where Initialize() must be called later.
   AudioDevice();
 
-  AudioDevice(size_t buffer_size,
-              int channels,
-              double sample_rate,
-              RenderCallback* callback);
+  AudioDevice(const AudioParameters& params, RenderCallback* callback);
 
   // AudioRendererSink implementation.
 
-  virtual void Initialize(size_t buffer_size,
-                          int channels,
-                          double sample_rate,
-                          AudioParameters::Format latency_format,
+  virtual void Initialize(const AudioParameters& params,
                           RenderCallback* callback) OVERRIDE;
   // Starts audio playback.
   virtual void Start() OVERRIDE;
 
   // Stops audio playback.
   virtual void Stop() OVERRIDE;
 
   // Resumes playback if currently paused.
   virtual void Play() OVERRIDE;
 
@@ skipping 70 matching lines @@
   // guard to control stopping and starting the audio thread.
   base::Lock audio_thread_lock_;
   AudioDeviceThread audio_thread_;
   scoped_ptr<AudioDevice::AudioThreadCallback> audio_callback_;
 
 
   DISALLOW_COPY_AND_ASSIGN(AudioDevice);
 };
 
 #endif  // CONTENT_RENDERER_MEDIA_AUDIO_DEVICE_H_