Add UseCounter for legacy document.* that returns HTMLCollection.

third_party/WebKit/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 85 matching lines @@
     readonly attribute DOMString referrer;
     [RaisesException] attribute DOMString cookie;
     readonly attribute DOMString lastModified;
     readonly attribute DocumentReadyState readyState;
 
     // DOM tree accessors
     [CustomElementCallbacks] attribute DOMString title;
     [CustomElementCallbacks] attribute DOMString dir;
     [RaisesException=Setter, CustomElementCallbacks, PerWorldBindings] attribute HTMLElement? body;
     readonly attribute HTMLHeadElement? head;
-    [SameObject] readonly attribute HTMLCollection images;
-    [SameObject] readonly attribute HTMLCollection embeds;
-    [SameObject, ImplementedAs=embeds] readonly attribute HTMLCollection plugins;
-    [SameObject] readonly attribute HTMLCollection links;
-    [SameObject] readonly attribute HTMLCollection forms;
-    [SameObject] readonly attribute HTMLCollection scripts;
+    [SameObject, Measure] readonly attribute HTMLCollection images;
+    [SameObject, Measure] readonly attribute HTMLCollection embeds;
+    [SameObject, ImplementedAs=embeds, Measure] readonly attribute HTMLCollection plugins;
+    [SameObject, Measure] readonly attribute HTMLCollection links;
+    [SameObject, Measure] readonly attribute HTMLCollection forms;
+    [SameObject, Measure] readonly attribute HTMLCollection scripts;
     [PerWorldBindings] NodeList getElementsByName(DOMString elementName);
     [ImplementedAs=currentScriptForBinding] readonly attribute HTMLScriptElement? currentScript;
 
     // dynamic markup insertion
     // FIXME: There are two open() methods in the spec.
     [Custom, CustomElementCallbacks, RaisesException] void open();
     [RaisesException] void close();
     [CallWith=EnteredWindow, CustomElementCallbacks, RaisesException] void write(DOMString... text);
     [CallWith=EnteredWindow, CustomElementCallbacks, RaisesException] void writeln(DOMString... text);
 
     // user interaction
     [ImplementedAs=domWindow] readonly attribute Window? defaultView;
     boolean hasFocus();
     [CustomElementCallbacks, MeasureAs=DocumentDesignMode] attribute DOMString designMode;
     [CustomElementCallbacks, RaisesException] boolean execCommand(DOMString commandId, optional boolean showUI = false, optional DOMString value = "");
     [RaisesException] boolean queryCommandEnabled(DOMString commandId);
     [RaisesException] boolean queryCommandIndeterm(DOMString commandId);
     [RaisesException] boolean queryCommandState(DOMString commandId);
     [RaisesException] boolean queryCommandSupported(DOMString commandId);
     [RaisesException] DOMString queryCommandValue(DOMString commandId);
 
     [LenientThis] attribute EventHandler onreadystatechange;
 
     // HTML obsolete features
     // https://html.spec.whatwg.org/#Document-partial
 
     // FIXME: *Color are on HTMLDocument.
 
-    readonly attribute HTMLCollection anchors;
-    readonly attribute HTMLCollection applets;
+    [Measure] readonly attribute HTMLCollection anchors;
+    [Measure] readonly attribute HTMLCollection applets;
 
     // FIXME: clear(), captureEvents(), releaseEvents() and all are on HTMLDocument.
 
     // CSS Object Model (CSSOM)
     // http://dev.w3.org/csswg/cssom/#extensions-to-the-document-interface
     attribute DOMString? selectedStylesheetSet;
     readonly attribute DOMString? preferredStylesheetSet;
 
     readonly attribute Element? scrollingElement;
 
@@ skipping 62 matching lines @@
     [RuntimeEnabled=ExperimentalContentSecurityPolicyFeatures] attribute EventHandler onsecuritypolicyviolation;
     attribute EventHandler onselectionchange;
     attribute EventHandler onselectstart;
     attribute EventHandler onwheel;
 };
 
 Document implements GlobalEventHandlers;
 Document implements ParentNode;
 Document implements NonElementParentNode;
 Document implements DocumentOrShadowRoot;