Call checkCompleted() synchronously in HTMLStyleElement::dispatchPendingEvent()

third_party/WebKit/Source/core/html/HTMLStyleElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2010 Apple Inc. All rights reserved.
  *           (C) 2007 Rob Buis (buis@kde.org)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
@@ skipping 88 matching lines @@
 
 const AtomicString& HTMLStyleElement::media() const {
   return getAttribute(mediaAttr);
 }
 
 const AtomicString& HTMLStyleElement::type() const {
   return getAttribute(typeAttr);
 }
 
 void HTMLStyleElement::dispatchPendingEvent(
-    std::unique_ptr<IncrementLoadEventDelayCount>) {
+    std::unique_ptr<IncrementLoadEventDelayCount> count) {
   dispatchEvent(Event::create(m_loadedSheet ? EventTypeNames::load
                                             : EventTypeNames::error));
+
+  // Checks Document's load event synchronously here for performance.
+  // This is safe because dispatchPendingEvent() is called asynchronously.
+  count->clearAndCheckLoadEvent();
 }
 
 void HTMLStyleElement::notifyLoadedSheetAndAllCriticalSubresources(
     LoadedSheetErrorStatus errorStatus) {
   bool isLoadEvent = errorStatus == NoErrorLoadingSubresource;
   if (m_firedLoad && isLoadEvent)
     return;
   m_loadedSheet = isLoadEvent;
   TaskRunnerHelper::get(TaskType::DOMManipulation, &document())
       ->postTask(
@@ skipping 15 matching lines @@
   if (CSSStyleSheet* styleSheet = sheet())
     styleSheet->setDisabled(setDisabled);
 }
 
 DEFINE_TRACE(HTMLStyleElement) {
   StyleElement::trace(visitor);
   HTMLElement::trace(visitor);
 }
 
 }  // namespace blink