2nd arg of document.createElement should be an object

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  *           (C) 2006 Alexey Proskuryakov (ap@webkit.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All
  * rights reserved.
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved.
  * (http://www.torchmobile.com/)
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
@@ skipping 144 matching lines @@
 class ScriptableDocumentParser;
 class ScriptedAnimationController;
 class ScriptedIdleTaskController;
 class ScrollStateCallback;
 class SecurityOrigin;
 class SegmentedString;
 class SelectorQueryCache;
 class SerializedScriptValue;
 class Settings;
 class SnapCoordinator;
+class StringOrDictionary;
 class StyleEngine;
 class StyleResolver;
 class StyleSheet;
 class StyleSheetList;
 class Text;
 class TextAutosizer;
 class Touch;
 class TouchList;
 class TransformSource;
 class TreeWalker;
@@ skipping 962 matching lines @@
   EventTarget* errorEventTarget() final;
   void exceptionThrown(ErrorEvent*) final;
 
   void initDNSPrefetch();
 
   bool isInDocumentWrite() const { return m_writeRecursionDepth > 0; }
 
   TextAutosizer* textAutosizer();
 
   Element* createElement(const AtomicString& localName,
-                         const AtomicString& typeExtension,
+                         const StringOrDictionary&,
                          ExceptionState&);
   Element* createElementNS(const AtomicString& namespaceURI,
                            const AtomicString& qualifiedName,
-                           const AtomicString& typeExtension,
+                           const StringOrDictionary&,
                            ExceptionState&);
   ScriptValue registerElement(
       ScriptState*,
       const AtomicString& name,
       const ElementRegistrationOptions&,
       ExceptionState&,
       V0CustomElement::NameSet validNames = V0CustomElement::StandardNames);
   V0CustomElementRegistrationContext* registrationContext() {
     return m_registrationContext.get();
   }
@@ skipping 558 matching lines @@
 DEFINE_TYPE_CASTS(TreeScope, Document, document, true, true);
 
 }  // namespace blink
 
 #ifndef NDEBUG
 // Outside the WebCore namespace for ease of invocation from gdb.
 CORE_EXPORT void showLiveDocumentInstances();
 #endif
 
 #endif  // Document_h