[scheduler] Teach scheduler about audio state

content/browser/web_contents/web_contents_impl.h

Index: content/browser/web_contents/web_contents_impl.h
diff --git a/content/browser/web_contents/web_contents_impl.h b/content/browser/web_contents/web_contents_impl.h
index 52f656aa16daf65aa5e6e54cb1b084c1991dee4f..6b708fab18a802db0980be8931022b1c78a28ea1 100644
--- a/content/browser/web_contents/web_contents_impl.h
+++ b/content/browser/web_contents/web_contents_impl.h
@@ -283,6 +283,7 @@ class CONTENT_EXPORT WebContentsImpl
       const base::Callback<void(RenderFrameHost*)>& on_frame) override;
   std::vector<RenderFrameHost*> GetAllFrames() override;
   int SendToAllFrames(IPC::Message* message) override;
+  int SendToAllViews(IPC::Message* message) override;
   RenderViewHostImpl* GetRenderViewHost() const override;
   int GetRoutingID() const override;
   RenderWidgetHostView* GetRenderWidgetHostView() const override;
@@ -327,6 +328,7 @@ class CONTENT_EXPORT WebContentsImpl
   int GetCrashedErrorCode() const override;
   bool IsBeingDestroyed() const override;
   void NotifyNavigationStateChanged(InvalidateTypes changed_flags) override;
+  void OnAudioStateChanged(bool is_audio_playing) override;
   base::TimeTicks GetLastActiveTime() const override;
   void SetLastActiveTime(base::TimeTicks last_active_time) override;
   void WasShown() override;