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

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2010 Apple Inc. ALl rights reserved.
  *
  * 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
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 26 matching lines @@
 
  public:
   static HTMLStyleElement* create(Document&, bool createdByParser);
   ~HTMLStyleElement() override;
 
   using StyleElement::sheet;
 
   bool disabled() const;
   void setDisabled(bool);
 
-  void dispatchPendingEvent(std::unique_ptr<IncrementLoadEventDelayCount>);
-
   DECLARE_VIRTUAL_TRACE();
 
  private:
   HTMLStyleElement(Document&, bool createdByParser);
 
+  // Always call this asynchronously because this can cause synchronous
+  // Document load event and JavaScript execution.
+  void dispatchPendingEvent(std::unique_ptr<IncrementLoadEventDelayCount>);
+
   // overload from HTMLElement
   void parseAttribute(const AttributeModificationParams&) override;
   InsertionNotificationRequest insertedInto(ContainerNode*) override;
   void didNotifySubtreeInsertionsToDocument() override;
   void removedFrom(ContainerNode*) override;
   void childrenChanged(const ChildrenChange&) override;
 
   void finishParsingChildren() override;
 
   bool sheetLoaded() override { return StyleElement::sheetLoaded(document()); }
   void notifyLoadedSheetAndAllCriticalSubresources(
       LoadedSheetErrorStatus) override;
   void startLoadingDynamicSheet() override {
     StyleElement::startLoadingDynamicSheet(document());
   }
 
   const AtomicString& media() const override;
   const AtomicString& type() const override;
 
   bool m_firedLoad;
   bool m_loadedSheet;
 };
 
 }  // namespace blink
 
 #endif  // HTMLStyleElement_h