Allow expensive task blocking if there is pending iframe navigation

components/scheduler/renderer/renderer_web_scheduler_impl.cc

Index: components/scheduler/renderer/renderer_web_scheduler_impl.cc
diff --git a/components/scheduler/renderer/renderer_web_scheduler_impl.cc b/components/scheduler/renderer/renderer_web_scheduler_impl.cc
index cb837b37fcbf4c6d67f6e76c8ae4d42e10a5e748..e53e01d3ca2320ffebd95348108bc52954f535d5 100644
--- a/components/scheduler/renderer/renderer_web_scheduler_impl.cc
+++ b/components/scheduler/renderer/renderer_web_scheduler_impl.cc
@@ -42,14 +42,6 @@ RendererWebSchedulerImpl::createWebViewScheduler(blink::WebView* web_view) {
       command_line->HasSwitch(switches::kDisableBackgroundTimerThrottling)));
 }
 
-void RendererWebSchedulerImpl::addPendingNavigation() {
-  renderer_scheduler_->AddPendingNavigation();
-}
-
-void RendererWebSchedulerImpl::removePendingNavigation() {
-  renderer_scheduler_->RemovePendingNavigation();
-}
-
 void RendererWebSchedulerImpl::onNavigationStarted() {
   renderer_scheduler_->OnNavigationStarted();
 }