IDL: make optional arguments (without default) explicit sometimes

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 080c6c0919080c212b2bc5638c8f6af1ab21ca79..eb689947d69f8e27c450d39e5a361b40e32108d1 100644
--- a/Source/core/dom/Document.idl
+++ b/Source/core/dom/Document.idl
@@ -35,17 +35,17 @@ typedef (CanvasRenderingContext2D or WebGLRenderingContext) RenderingContext;
     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(optional DOMString data); // Removed from DOM4.
     [RaisesException] ProcessingInstruction createProcessingInstruction(DOMString target, DOMString data);
-    [RaisesException, MeasureAs=DocumentCreateAttribute] Attr createAttribute([Default=Undefined] optional DOMString name); // Removed from DOM4.
+    [RaisesException, MeasureAs=DocumentCreateAttribute] Attr createAttribute(optional DOMString name = "undefined"); // Removed from DOM4.
     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, DeprecateAs=DocumentCreateAttributeNS] Attr createAttributeNS([Default=Undefined] optional DOMString? namespaceURI,
-                                                                                    [Default=Undefined] optional DOMString? qualifiedName); // Removed from DOM4.
+    [RaisesException, DeprecateAs=DocumentCreateAttributeNS] Attr createAttributeNS(optional DOMString? namespaceURI,
+                                                                                    optional DOMString? qualifiedName); // Removed from DOM4.
     HTMLCollection getElementsByTagNameNS(DOMString? namespaceURI, DOMString localName);
     [PerWorldBindings] Element getElementById(DOMString elementId);
 
@@ -88,23 +88,23 @@ typedef (CanvasRenderingContext2D or WebGLRenderingContext) RenderingContext;
 
     // DOM Level 2 Style (DocumentCSS interface)
 
-    CSSStyleDeclaration getOverrideStyle([Default=Undefined] optional Element element,
-                                         [Default=Undefined] optional DOMString pseudoElement);
+    CSSStyleDeclaration getOverrideStyle(optional Element element,
+                                         optional DOMString pseudoElement);
 
     // DOM 4
     readonly attribute DOMString contentType;
 
     // Common extensions
     [CustomElementCallbacks]
-    boolean            execCommand([Default=Undefined] optional DOMString command,
-                                   [Default=Undefined] optional boolean userInterface,
-                                   [TreatUndefinedAs=NullString, Default=Undefined] optional DOMString? value);
+    boolean            execCommand(optional DOMString command,
+                                   optional boolean userInterface,
+                                   [TreatUndefinedAs=NullString] optional DOMString? value);
 
-    boolean            queryCommandEnabled([Default=Undefined] optional DOMString command);
-    boolean            queryCommandIndeterm([Default=Undefined] optional DOMString command);
-    boolean            queryCommandState([Default=Undefined] optional DOMString command);
-    boolean            queryCommandSupported([Default=Undefined] optional DOMString command);
-    DOMString          queryCommandValue([Default=Undefined] optional DOMString command);
+    boolean            queryCommandEnabled(optional DOMString command);
+    boolean            queryCommandIndeterm(optional DOMString command);
+    boolean            queryCommandState(optional DOMString command);
+    boolean            queryCommandSupported(optional DOMString command);
+    DOMString          queryCommandValue(optional DOMString command);
 
     // Moved down from HTMLDocument
              [TreatNullAs=NullString, CustomElementCallbacks] attribute DOMString dir;
@@ -129,7 +129,7 @@ typedef (CanvasRenderingContext2D or WebGLRenderingContext) RenderingContext;
     readonly attribute HTMLCollection anchors;
     readonly attribute DOMString lastModified;
 
-    [PerWorldBindings] NodeList getElementsByName([Default=Undefined] optional DOMString elementName);
+    [PerWorldBindings] NodeList getElementsByName(optional DOMString elementName);
 
     [PutForwards=href] readonly attribute Location location;
 
@@ -138,11 +138,11 @@ typedef (CanvasRenderingContext2D or WebGLRenderingContext) RenderingContext;
     [MeasureAs=DocumentDefaultCharset, TreatReturnedNullStringAs=Undefined] readonly attribute DOMString defaultCharset;
     [TreatReturnedNullStringAs=Undefined] readonly attribute DOMString readyState;
 
-    Element            elementFromPoint([Default=Undefined] optional long x,
-                                        [Default=Undefined] optional long y);
+    Element            elementFromPoint(optional long x,
+                                        optional long y);
     [MeasureAs=DocumentCaretRangeFromPoint]
-    Range              caretRangeFromPoint([Default=Undefined] optional long x,
-                                           [Default=Undefined] optional long y);
+    Range              caretRangeFromPoint(optional long x,
+                                           optional long y);
 
     // Mozilla extensions
     Selection          getSelection();
@@ -185,17 +185,17 @@ typedef (CanvasRenderingContext2D or WebGLRenderingContext) RenderingContext;
     [RuntimeEnabled=Touch] attribute EventHandler ontouchstart;
     attribute EventHandler onwheel;
 
-    [RuntimeEnabled=Touch] Touch createTouch([Default=Undefined] optional Window window,
-                                             [Default=Undefined] optional EventTarget target,
-                                             [Default=Undefined] optional long identifier,
-                                             [Default=Undefined] optional double pageX,
-                                             [Default=Undefined] optional double pageY,
-                                             [Default=Undefined] optional double screenX,
-                                             [Default=Undefined] optional double screenY,
-                                             [Default=Undefined] optional double webkitRadiusX,
-                                             [Default=Undefined] optional double webkitRadiusY,
-                                             [Default=Undefined] optional float webkitRotationAngle,
-                                             [Default=Undefined] optional float webkitForce);
+    [RuntimeEnabled=Touch] Touch createTouch(optional Window window,
+                                             optional EventTarget target,
+                                             optional long identifier,
+                                             optional double pageX,
+                                             optional double pageY,
+                                             optional double screenX,
+                                             optional double screenY,
+                                             optional double webkitRadiusX,
+                                             optional double webkitRadiusY,
+                                             optional float webkitRotationAngle,
+                                             optional float webkitForce);
     [RuntimeEnabled=Touch] TouchList createTouchList(Touch... touches);
 
     [CallWith=ScriptState, CustomElementCallbacks, RaisesException, MeasureAs=DocumentRegisterElement] CustomElementConstructor registerElement(DOMString name, optional Dictionary options);