Make arguments to Document methods non-optional

LayoutTests/fast/dom/wrapper-classes.html

Index: LayoutTests/fast/dom/wrapper-classes.html
diff --git a/LayoutTests/fast/dom/wrapper-classes.html b/LayoutTests/fast/dom/wrapper-classes.html
index 56014cf6ea37f6937c305ff6beeb3a32cf537c03..d460b6bb5431c9099ae9841c4399726d435e1b27 100644
--- a/LayoutTests/fast/dom/wrapper-classes.html
+++ b/LayoutTests/fast/dom/wrapper-classes.html
@@ -79,14 +79,14 @@ function runTest()
     debug('');
 
     test("document.createAttribute()", "Attr");
-    test("document.createComment()", "Comment");
+    test("document.createComment('')", "Comment");
     test("document.createDocumentFragment()", "DocumentFragment");
     test("document.implementation", "DOMImplementation");
     test("root.attributes", "NamedNodeMap");
     test("document.createNodeIterator(root, 0, null, false)", "NodeIterator");
     test("document.getElementsByTagName('div')", "NodeList");
     test("document.createRange()", "Range");
-    test("document.createTextNode()", "Text");
+    test("document.createTextNode('')", "Text");
     test("document.createTreeWalker(root, 0, null, false)", "TreeWalker");
 
     debug('');
@@ -96,7 +96,7 @@ function runTest()
     test("xmlDocument", "Document");
     test("xmlDocument.createCDATASection()", "CDATASection");
     test("xmlDocument.createElementNS('x', 'x', 'x')", "Element");
-    test("xmlDocument.createProcessingInstruction()", "ProcessingInstruction");
+    test("xmlDocument.createProcessingInstruction('x', '')", "ProcessingInstruction");
 
     debug('');
     debug('Events');