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

content/browser/frame_host/render_frame_host_impl.h

Index: content/browser/frame_host/render_frame_host_impl.h
diff --git a/content/browser/frame_host/render_frame_host_impl.h b/content/browser/frame_host/render_frame_host_impl.h
index 420a2c2795d7512d3ac241213dc4854290d45737..4898cbcd151ca0da318e6b095dba8ad72ba624eb 100644
--- a/content/browser/frame_host/render_frame_host_impl.h
+++ b/content/browser/frame_host/render_frame_host_impl.h
@@ -24,6 +24,7 @@
 #include "content/browser/accessibility/browser_accessibility_manager.h"
 #include "content/browser/bad_message.h"
 #include "content/browser/loader/global_routing_id.h"
+#include "content/browser/media/audio_output_impl.h"
 #include "content/browser/site_instance_impl.h"
 #include "content/browser/webui/web_ui_impl.h"
 #include "content/common/accessibility_mode_enums.h"
@@ -204,6 +205,10 @@ class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost,
   // after they are blocked in RenderWidgetHelper::CreateNewWindow.
   void Init();
 
+  void set_audio_output_impl(AudioOutputImpl* audio_output_impl) {
+    audio_output_impl_ = audio_output_impl;
+  }
+
   int routing_id() const { return routing_id_; }
   void OnCreateChildFrame(
       int new_routing_id,
@@ -847,6 +852,8 @@ class CONTENT_EXPORT RenderFrameHostImpl : public RenderFrameHost,
   // RenderFrameHost.
   bool navigations_suspended_;
 
+  AudioOutputImpl* audio_output_impl_;
+
   // Holds the parameters for a suspended navigation. This can only happen while
   // this RFH is the pending RenderFrameHost of a RenderFrameHostManager. There
   // will only ever be one suspended navigation, because RenderFrameHostManager