Make arguments to some Document and Element methods non-optional

Source/core/dom/Document.idl

Index: Source/core/dom/Document.idl
diff --git a/Source/core/dom/Document.idl b/Source/core/dom/Document.idl
index 108394e2f55fedd0f24f129512c8c70e67152f90..e111c30956716a70d865988b251fb4af6f5be754 100644
--- a/Source/core/dom/Document.idl
+++ b/Source/core/dom/Document.idl
@@ -33,17 +33,16 @@ interface Document : Node {
     DocumentFragment createDocumentFragment();
     Text createTextNode(DOMString data);
     Comment createComment(DOMString data);
-    [RaisesException, MeasureAs=DocumentCreateCDATASection] CDATASection createCDATASection([Default=Undefined] optional DOMString data); // Removed from DOM4.
+    [RaisesException, MeasureAs=DocumentCreateCDATASection] CDATASection createCDATASection(DOMString data); // Removed from DOM4.
     [RaisesException] ProcessingInstruction createProcessingInstruction(DOMString target, DOMString data);
-    [RaisesException, MeasureAs=DocumentCreateAttribute] Attr createAttribute([Default=Undefined] optional DOMString name);
+    [RaisesException, MeasureAs=DocumentCreateAttribute] Attr createAttribute(DOMString name);
     HTMLCollection getElementsByTagName(DOMString localName);
 
     // Introduced in DOM Level 2:
 
     [CustomElementCallbacks, RaisesException, TypeChecking=Interface] Node importNode(Node node, optional boolean deep = false);
     [CustomElementCallbacks, RaisesException] Element createElementNS(DOMString? namespaceURI, DOMString qualifiedName);
-    [RaisesException, MeasureAs=DocumentCreateAttributeNS] Attr createAttributeNS([Default=Undefined] optional DOMString? namespaceURI,
-                                                                                  [Default=Undefined] optional DOMString? qualifiedName);
+    [RaisesException, MeasureAs=DocumentCreateAttributeNS] Attr createAttributeNS(DOMString? namespaceURI, DOMString? qualifiedName);
     HTMLCollection getElementsByTagNameNS(DOMString? namespaceURI, DOMString localName);
     [PerWorldBindings] Element getElementById(DOMString elementId);