Make AudioParameters a class instead of a struct

content/renderer/media/renderer_webaudiodevice_impl.h

Index: content/renderer/media/renderer_webaudiodevice_impl.h
diff --git a/content/renderer/media/renderer_webaudiodevice_impl.h b/content/renderer/media/renderer_webaudiodevice_impl.h
index b895d038d66c3b23aaed358e362854c5c7cfa365..7b66033c23f600d7ca8c38fdaac36ec5ae903644 100644
--- a/content/renderer/media/renderer_webaudiodevice_impl.h
+++ b/content/renderer/media/renderer_webaudiodevice_impl.h
@@ -12,12 +12,12 @@
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebAudioDevice.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/platform/WebVector.h"
 
+class AudioParameters;
+
 class RendererWebAudioDeviceImpl : public WebKit::WebAudioDevice,
                                    public AudioDevice::RenderCallback {
  public:
-  RendererWebAudioDeviceImpl(size_t buffer_size,
-                             int channels,
-                             double sample_rate,
+  RendererWebAudioDeviceImpl(const AudioParameters& params,
                              WebKit::WebAudioDevice::RenderCallback* callback);
   virtual ~RendererWebAudioDeviceImpl();