Pause HTML parser for external stylesheets in the body

third_party/WebKit/Source/core/dom/ScriptableDocumentParser.h

 /*
  * Copyright (C) 2010 Google, Inc. All Rights Reserved.
  *
  * 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
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 26 matching lines @@
  public:
   // Only used by Document::open for deciding if its safe to act on a
   // JavaScript document.open() call right now, or it should be ignored.
   virtual bool isExecutingScript() const { return false; }
 
   // FIXME: Only the HTMLDocumentParser ever blocks script execution on
   // stylesheet load, which is likely a bug in the XMLDocumentParser.
   virtual void executeScriptsWaitingForResources() {}
 
   virtual bool isWaitingForScripts() const = 0;
+  virtual void didAddPendingStylesheetInBody() {}
+  virtual void didLoadAllStylesheets() {}
 
   // These are used to expose the current line/column to the scripting system.
   virtual bool isParsingAtLineNumber() const;
   virtual OrdinalNumber lineNumber() const = 0;
   virtual TextPosition textPosition() const = 0;
 
   void setWasCreatedByScript(bool wasCreatedByScript) {
     m_wasCreatedByScript = wasCreatedByScript;
   }
   bool wasCreatedByScript() const { return m_wasCreatedByScript; }
 
   ParserContentPolicy getParserContentPolicy() { return m_parserContentPolicy; }
 
  protected:
   explicit ScriptableDocumentParser(
       Document&,
       ParserContentPolicy = AllowScriptingContent);
 
  private:
   ScriptableDocumentParser* asScriptableDocumentParser() final { return this; }
 
   // http://www.whatwg.org/specs/web-apps/current-work/#script-created-parser
   bool m_wasCreatedByScript;
   ParserContentPolicy m_parserContentPolicy;
 };
 
 }  // namespace blink
 
 #endif  // ScriptableDocumentParser_h