Make AudioParameters a class instead of a struct

content/renderer/media/audio_device.h

Index: content/renderer/media/audio_device.h
diff --git a/content/renderer/media/audio_device.h b/content/renderer/media/audio_device.h
index 3abb04f13bb5db2918c9acde3e2e598c59cf67ae..4cdb94642916ad85499ebb9d41b7cde3a5fd0c4d 100644
--- a/content/renderer/media/audio_device.h
+++ b/content/renderer/media/audio_device.h
@@ -86,17 +86,11 @@ class CONTENT_EXPORT AudioDevice
   // 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;