ResourceScheduler get visual signal from RenderViewHostImpl

content/browser/loader/resource_dispatcher_host_impl.h

Index: content/browser/loader/resource_dispatcher_host_impl.h
diff --git a/content/browser/loader/resource_dispatcher_host_impl.h b/content/browser/loader/resource_dispatcher_host_impl.h
index 269af9215f943228470130f189116c1b93a1381d..7cb177180642333a5c6362141eabe965c1c13ef3 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.h
+++ b/content/browser/loader/resource_dispatcher_host_impl.h
@@ -164,11 +164,17 @@ class CONTENT_EXPORT ResourceDispatcherHostImpl
   }
 
   // Called when a RenderViewHost is created.
-  void OnRenderViewHostCreated(int child_id, int route_id);
+  void OnRenderViewHostCreated(int child_id, int route_id, bool is_visible);
 
   // Called when a RenderViewHost is deleted.
   void OnRenderViewHostDeleted(int child_id, int route_id);
 
+  // Called when a RenderViewHost is hidden.
+  void OnRenderViewHostWasHidden(int child_id, int route_id);
+
+  // Called when a RenderViewHost is shown.
+  void OnRenderViewHostWasShown(int child_id, int route_id);
+
   // Force cancels any pending requests for the given process.
   void CancelRequestsForProcess(int child_id);