Switch stream creation and closing in Chrome audio rendering from IPC to Mojo

content/public/browser/render_frame_host.h

Index: content/public/browser/render_frame_host.h
diff --git a/content/public/browser/render_frame_host.h b/content/public/browser/render_frame_host.h
index 86ac9d5296b3b959a675d60c311a313c9a3dab02..46de81cee558a80b70eb206a599f6843e2b4cc1d 100644
--- a/content/public/browser/render_frame_host.h
+++ b/content/public/browser/render_frame_host.h
@@ -24,6 +24,7 @@ class Value;
 }
 
 namespace content {
+class AudioOutputImpl;
 class RenderProcessHost;
 class RenderViewHost;
 class RenderWidgetHostView;
@@ -60,6 +61,10 @@ class CONTENT_EXPORT RenderFrameHost : public IPC::Listener,
 
   ~RenderFrameHost() override {}
 
+  virtual AudioOutputImpl* GetAudioOutputImpl() = 0;
+
+  virtual void SetAudioOutputImpl(AudioOutputImpl* audio_output_impl) = 0;
+
   // Returns the route id for this frame.
   virtual int GetRoutingID() = 0;