Adds AudioDevice factory for all audio clients in Chrome

content/renderer/render_view_impl.h

Index: content/renderer/render_view_impl.h
diff --git a/content/renderer/render_view_impl.h b/content/renderer/render_view_impl.h
index f2401940df8e6b487475b1c811c863ede7eca6e5..2f1cbdd4ddbd9d503a737978f70a5bf3dec1c6bd 100644
--- a/content/renderer/render_view_impl.h
+++ b/content/renderer/render_view_impl.h
@@ -61,6 +61,7 @@
 #pragma warning(disable: 4250)
 #endif
 
+class AudioDeviceFactoryInterface;
 class CommandLine;
 class DeviceOrientationDispatcher;
 class DevToolsAgent;
@@ -228,6 +229,10 @@ class RenderViewImpl : public RenderWidget,
 
   int history_list_offset() const { return history_list_offset_; }
 
+  AudioDeviceFactoryInterface* audio_device_factory() const {
+      return audio_device_factory_.get();
+  }
+
   const webkit_glue::WebPreferences& webkit_preferences() const {
     return webkit_preferences_;
   }
@@ -1332,6 +1337,10 @@ class RenderViewImpl : public RenderWidget,
 
   // Misc ----------------------------------------------------------------------
 
+  // Allows users to create media::AudioRendererSink objects with different
+  // implementations.
+  scoped_ptr<AudioDeviceFactoryInterface> audio_device_factory_;
+
   // The current and pending file chooser completion objects. If the queue is
   // nonempty, the first item represents the currently running file chooser
   // callback, and the remaining elements are the other file chooser completion