2nd arg of document.createElement should be an object

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

Index: third_party/WebKit/Source/core/dom/Document.h
diff --git a/third_party/WebKit/Source/core/dom/Document.h b/third_party/WebKit/Source/core/dom/Document.h
index 83ec6a96b74ccc996175c487ea241cff5b7c6570..7f3e4c3d6dcbc5849fafadea3d5cd6c21ff8973f 100644
--- a/third_party/WebKit/Source/core/dom/Document.h
+++ b/third_party/WebKit/Source/core/dom/Document.h
@@ -162,6 +162,7 @@ class SelectorQueryCache;
 class SerializedScriptValue;
 class Settings;
 class SnapCoordinator;
+class StringOrDictionary;
 class StyleEngine;
 class StyleResolver;
 class StyleSheet;
@@ -1144,11 +1145,11 @@ class CORE_EXPORT Document : public ContainerNode,
   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*,