Disallow certain blocking DOM calls during microtask execution.

third_party/WebKit/Source/core/frame/LocalDOMWindow.h

 /*
  * Copyright (C) 2006, 2007, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 101 matching lines @@
     void setStatus(const String&) override;
     String defaultStatus() const override;
     void setDefaultStatus(const String&) override;
     Document* document() const override;
     StyleMedia* styleMedia() const override;
     double devicePixelRatio() const override;
     ApplicationCache* applicationCache() const override;
     int orientation() const override;
     DOMSelection* getSelection() override;
     void blur() override;
-    void print() override;
+    void print(ScriptState*) override;
     void stop() override;
-    void alert(const String& message = String()) override;
-    bool confirm(const String& message) override;
-    String prompt(const String& message, const String& defaultValue) override;
+    void alert(ScriptState*, const String& message = String()) override;
+    bool confirm(ScriptState*, const String& message) override;
+    String prompt(ScriptState*, const String& message, const String& defaultValue) override;
     bool find(const String&, bool caseSensitive, bool backwards, bool wrap, bool wholeWord, bool searchInFrames, bool showDialog) const override;
 
     // FIXME: ScrollBehaviorSmooth is currently unsupported in VisualViewport.
     // crbug.com/434497
     void scrollBy(double x, double y, ScrollBehavior = ScrollBehaviorAuto) const override;
     void scrollBy(const ScrollToOptions&) const override;
     void scrollTo(double x, double y) const override;
     void scrollTo(const ScrollToOptions&) const override;
 
     void moveBy(int x, int y) const override;
@@ skipping 120 matching lines @@
 }
 
 inline String LocalDOMWindow::defaultStatus() const
 {
     return m_defaultStatus;
 }
 
 } // namespace blink
 
 #endif // LocalDOMWindow_h