Add audio signal to the ResourceScheduler.

content/browser/loader/resource_scheduler.h

Index: content/browser/loader/resource_scheduler.h
diff --git a/content/browser/loader/resource_scheduler.h b/content/browser/loader/resource_scheduler.h
index a2a873e77562f7c4b792641338925e74a2f7dca4..be747b8cbb27ef421a60c018d1e29a6327a6f110 100644
--- a/content/browser/loader/resource_scheduler.h
+++ b/content/browser/loader/resource_scheduler.h
@@ -122,6 +122,9 @@ class CONTENT_EXPORT ResourceScheduler : public base::NonThreadSafe {
   // Called when a Client is shown or hidden.
   void OnVisibilityChanged(int child_id, int route_id, bool is_visible);
 
+  // Called when a Client starts or stops playing audio.
+  void OnAudibilityChanged(int child_id, int route_id, bool is_audible);
+
   // Signals from IPC messages directly from the renderers:
 
   // Called when a client navigates to a new main document.
@@ -142,9 +145,6 @@ class CONTENT_EXPORT ResourceScheduler : public base::NonThreadSafe {
   // Called to check if all user observable tabs have completed loading.
   bool active_clients_loaded() const { return active_clients_loading_ == 0; }
 
-  // Called when a Client starts or stops playing audio.
-  void OnAudibilityChanged(int child_id, int route_id, bool is_audible);
-
   bool IsClientVisibleForTesting(int child_id, int route_id);
 
  private: