Add use counters for a number of extensions and non-standard APIs

Source/core/dom/Element.idl

 /*
  * Copyright (C) 2006, 2007, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Samuel Weinig <sam.weinig@gmail.com>
  *
  * 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 68 matching lines @@
     [Custom=Setter] attribute long scrollTop;
     readonly attribute long scrollWidth;
     readonly attribute long scrollHeight;
 
     void focus();
     void blur();
     void scrollIntoView(optional boolean alignWithTop);
 
     // WebKit extensions
 
-    void scrollIntoViewIfNeeded(optional boolean centerIfNeeded);
-    void scrollByLines([Default=Undefined] optional long lines);
-    void scrollByPages([Default=Undefined] optional long pages);
+    [MeasureAs=ElementScrollIntoViewIfNeeded] void scrollIntoViewIfNeeded(optional boolean centerIfNeeded);
+    [MeasureAs=ElementScrollByLines] void scrollByLines([Default=Undefined] optional long lines);
+    [MeasureAs=ElementScrollByPages] void scrollByPages([Default=Undefined] optional long pages);
 
     // HTML 5
     HTMLCollection getElementsByClassName(DOMString classNames);
     [TreatNullAs=NullString, CustomElementCallbacks, PerWorldBindings, LogActivity=SetterOnly, RaisesException=Setter] attribute DOMString innerHTML;
     [TreatNullAs=NullString, CustomElementCallbacks, RaisesException=Setter] attribute DOMString outerHTML;
 
     [RaisesException, CustomElementCallbacks, MeasureAs=InsertAdjacentElement] Element insertAdjacentElement(DOMString where, Element element);
     [RaisesException, MeasureAs=InsertAdjacentText] void insertAdjacentText(DOMString where, DOMString text);
     [CustomElementCallbacks, RaisesException, MeasureAs=InsertAdjacentHTML] void insertAdjacentHTML(DOMString where, DOMString html);
 
@@ skipping 36 matching lines @@
     [RuntimeEnabled=Touch] attribute EventHandler ontouchend;
     [RuntimeEnabled=Touch] attribute EventHandler ontouchmove;
     [RuntimeEnabled=Touch] attribute EventHandler ontouchstart;
     attribute EventHandler onwebkitfullscreenchange;
     attribute EventHandler onwebkitfullscreenerror;
     [PerWorldBindings, LogActivity=SetterOnly] attribute EventHandler onwheel;
 };
 
 Element implements ParentNode;
 Element implements ChildNode;