Hook up loading signal to ResourceScheduler.

content/browser/loader/resource_dispatcher_host_impl.cc

Index: content/browser/loader/resource_dispatcher_host_impl.cc
diff --git a/content/browser/loader/resource_dispatcher_host_impl.cc b/content/browser/loader/resource_dispatcher_host_impl.cc
index f03773f06460a400ca5fc665254b742fa0d480ca..22ac6c03c70d48c7b0a3b11c7bbc54e8066c61ce 100644
--- a/content/browser/loader/resource_dispatcher_host_impl.cc
+++ b/content/browser/loader/resource_dispatcher_host_impl.cc
@@ -1360,6 +1360,12 @@ void ResourceDispatcherHostImpl::OnRenderViewHostDeleted(
   CancelRequestsForRoute(child_id, route_id);
 }
 
+void ResourceDispatcherHostImpl::OnRenderViewHostSetIsLoading(int child_id,
+                                                              int route_id,
+                                                              bool is_loading) {
+  scheduler_->OnLoadingStateChanged(child_id, route_id, !is_loading);
+}
+
 void ResourceDispatcherHostImpl::OnRenderViewHostWasHidden(
     int child_id,
     int route_id) {