IDL: make optional arguments (without default) explicit sometimes

Source/core/dom/Document.idl

 /*
  * Copyright (C) 2006, 2007, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006, 2007 Samuel Weinig <sam@webkit.org>
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 17 matching lines @@
 
     // DOM Level 1 Core
     readonly attribute DocumentType doctype;
     readonly attribute DOMImplementation implementation;
     readonly attribute Element documentElement;
 
     [CustomElementCallbacks, PerWorldBindings, RaisesException] Element createElement(DOMString tagName);
     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);
 
     // DOM Level 3 Core
 
     [MeasureAs=DocumentInputEncoding] readonly attribute DOMString? inputEncoding; // Removed from DOM4.
 
     [MeasureAs=DocumentXMLEncoding] readonly attribute DOMString? xmlEncoding; // Removed from DOM4.
     [RaisesException=Setter, MeasureAs=DocumentXMLVersion] attribute DOMString? xmlVersion; // Removed from DOM4.
     [RaisesException=Setter, MeasureAs=DocumentXMLStandalone] attribute boolean xmlStandalone; // Removed from DOM4.
@@ skipping 22 matching lines @@
     // DOM Level 2 Abstract Views (DocumentView interface)
 
     [ImplementedAs=executingWindow] readonly attribute Window defaultView;
 
     // DOM Level 2 Style (DocumentStyle interface)
 
     readonly attribute StyleSheetList styleSheets;
 
     // 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;
              [TreatNullAs=NullString, CustomElementCallbacks] attribute DOMString designMode;
              [TreatNullAs=NullString, CustomElementCallbacks] attribute DOMString title;
     readonly attribute DOMString referrer;
              [TreatNullAs=NullString, RaisesException=Setter] attribute DOMString domain;
     readonly attribute DOMString URL;
 
              [TreatNullAs=NullString, RaisesException] attribute DOMString cookie;
 
     [RaisesException=Setter, CustomElementCallbacks, PerWorldBindings, TypeChecking=Interface] attribute HTMLElement? body;
 
     readonly attribute HTMLHeadElement head;
     readonly attribute HTMLCollection images;
     readonly attribute HTMLCollection applets;
     readonly attribute HTMLCollection embeds;
     [ImplementedAs=embeds] readonly attribute HTMLCollection plugins;
     readonly attribute HTMLCollection links;
     readonly attribute HTMLCollection forms;
     readonly attribute HTMLCollection scripts;
     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;
 
     // IE extensions
     [MeasureAs=DocumentCharset, TreatReturnedNullStringAs=Undefined, TreatNullAs=NullString] attribute DOMString charset;
     [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();
     readonly attribute DOMString? characterSet;
 
     // WebKit extensions
 
     readonly attribute DOMString? preferredStylesheetSet;
              attribute DOMString? selectedStylesheetSet;
 
@@ skipping 22 matching lines @@
     attribute EventHandler onsearch;
     [RuntimeEnabled=ExperimentalContentSecurityPolicyFeatures] attribute EventHandler onsecuritypolicyviolation;
     attribute EventHandler onselectionchange;
     attribute EventHandler onselectstart;
     [RuntimeEnabled=Touch] attribute EventHandler ontouchcancel;
     [RuntimeEnabled=Touch] attribute EventHandler ontouchend;
     [RuntimeEnabled=Touch] attribute EventHandler ontouchmove;
     [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);
     [CustomElementCallbacks, PerWorldBindings, RaisesException] Element createElement(DOMString localName, DOMString? typeExtension);
     [CustomElementCallbacks, RaisesException] Element createElementNS(DOMString? namespaceURI, DOMString qualifiedName, DOMString? typeExtension);
 
     // Page visibility API.
     readonly attribute DOMString visibilityState;
     readonly attribute boolean hidden;
 
     // Deprecated prefixed page visibility API.
     // TODO(davidben): This is a property so attaching a deprecation warning results in false positives when outputting
     // document in the console. It's possible http://crbug.com/43394 will resolve this.
     [MeasureAs=PrefixedPageVisibility, ImplementedAs=visibilityState] readonly attribute DOMString webkitVisibilityState;
     [MeasureAs=PrefixedPageVisibility, ImplementedAs=hidden] readonly attribute boolean webkitHidden;
 
     readonly attribute HTMLScriptElement currentScript;
 };
 
 Document implements GlobalEventHandlers;
 Document implements ParentNode;