Sync execCommand() and queryCommand*() IDL with spec

LayoutTests/fast/dom/Document/missing-arguments.html

Index: LayoutTests/fast/dom/Document/missing-arguments.html
diff --git a/LayoutTests/fast/dom/Document/missing-arguments.html b/LayoutTests/fast/dom/Document/missing-arguments.html
index 058f77d537516cc0ed950738f24c62689fe0b349..d5833d914b554997f1796f86c6fd997a5faef559 100644
--- a/LayoutTests/fast/dom/Document/missing-arguments.html
+++ b/LayoutTests/fast/dom/Document/missing-arguments.html
@@ -19,13 +19,19 @@
     "createProcessingInstruction('xml')",
     "createProcessingInstruction()",
     "createTextNode()",
+    "execCommand()",
     "getElementById()",
     "getElementsByClassName()",
     "getElementsByName()",
     "getElementsByTagName()",
     "getElementsByTagNameNS('http://www.w3.org/2000/svg')",
     "getElementsByTagNameNS()",
-    "importNode()"
+    "importNode()",
+    "queryCommandEnabled()",
+    "queryCommandIndeterm()",
+    "queryCommandState()",
+    "queryCommandSupported()",
+    "queryCommandValue()",
 ].forEach(function(expr)
 {
     shouldThrow("document." + expr);