Don't preload scripts with invalid type/language attributes

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

 /*
  * Copyright (C) 2008 Nikolas Zimmermann <zimmermann@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
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 32 matching lines @@
     {
         return new ScriptLoader(element, createdByParser, isEvaluated, createdDuringDocumentWrite);
     }
 
     ~ScriptLoader() override;
     DECLARE_VIRTUAL_TRACE();
 
     Element* element() const { return m_element; }
 
     enum LegacyTypeSupport { DisallowLegacyTypeInTypeAttribute, AllowLegacyTypeInTypeAttribute };
+    static bool isValidScriptTypeAndLanguage(const String& typeAttributeValue, const String& languageAttributeValue, LegacyTypeSupport supportLegacyTypes);
+
     bool prepareScript(const TextPosition& scriptStartPosition = TextPosition::minimumPosition(), LegacyTypeSupport = DisallowLegacyTypeInTypeAttribute);
 
     String scriptCharset() const { return m_characterEncoding; }
     String scriptContent() const;
     // Returns false if and only if execution was blocked.
     bool executeScript(const ScriptSourceCode&, double* compilationFinishTime = 0);
     virtual void execute();
 
     // XML parser calls these
     void dispatchLoadEvent();
@@ skipping 59 matching lines @@
     const bool m_createdDuringDocumentWrite : 1;
 
     Member<PendingScript> m_pendingScript;
 };
 
 ScriptLoader* toScriptLoaderIfPossible(Element*);
 
 } // namespace blink
 
 #endif // ScriptLoader_h