Allow expensive task blocking if there is pending iframe navigation

components/scheduler/renderer/renderer_web_scheduler_impl.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/scheduler/renderer/renderer_web_scheduler_impl.h"
 
 #include <memory>
 
 #include "base/command_line.h"
 #include "base/memory/ptr_util.h"
@@ skipping 24 matching lines @@
 }
 
 std::unique_ptr<blink::WebViewScheduler>
 RendererWebSchedulerImpl::createWebViewScheduler(blink::WebView* web_view) {
   base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
   return base::WrapUnique(new WebViewSchedulerImpl(
       web_view, renderer_scheduler_,
       command_line->HasSwitch(switches::kDisableBackgroundTimerThrottling)));
 }
 
-void RendererWebSchedulerImpl::addPendingNavigation() {
-  renderer_scheduler_->AddPendingNavigation();
-}
-
-void RendererWebSchedulerImpl::removePendingNavigation() {
-  renderer_scheduler_->RemovePendingNavigation();
-}
-
 void RendererWebSchedulerImpl::onNavigationStarted() {
   renderer_scheduler_->OnNavigationStarted();
 }
 
 }  // namespace scheduler