Add use counters for lots of DOM APIs.

third_party/WebKit/Source/core/html/HTMLButtonElement.idl

 /*
  * Copyright (C) 2006, 2010 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,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 // https://html.spec.whatwg.org/#the-button-element
 
 interface HTMLButtonElement : HTMLElement {
-    [CEReactions, Reflect] attribute boolean autofocus;
+  [Measure, CEReactions, Reflect] attribute boolean autofocus;
     [CEReactions, Reflect] attribute boolean disabled;
     [ImplementedAs=formOwner] readonly attribute HTMLFormElement? form;
     [CEReactions] attribute DOMString formAction;
     [CEReactions] attribute DOMString formEnctype;
     [CEReactions] attribute DOMString formMethod;
     [CEReactions, Reflect] attribute boolean formNoValidate;
     [CEReactions, Reflect] attribute DOMString formTarget;
     [CEReactions, Reflect] attribute DOMString name;
     [CEReactions] attribute DOMString type;
     [CEReactions, Reflect] attribute DOMString value;
     // FIXME: attribute HTMLMenuElement? menu;
 
-    readonly attribute boolean willValidate;
-    readonly attribute ValidityState validity;
-    readonly attribute DOMString validationMessage;
-    boolean checkValidity();
-    boolean reportValidity();
-    void setCustomValidity(DOMString error);
+    [MeasureAs=ValidationAPI] readonly attribute boolean willValidate;
+    [MeasureAs=ValidationAPI] readonly attribute ValidityState validity;
+    [MeasureAs=ValidationAPI] readonly attribute DOMString validationMessage;
+    [MeasureAs=ValidationAPI] boolean checkValidity();
+    [MeasureAs=ValidationAPI] boolean reportValidity();
+    [MeasureAs=ValidationAPI] void setCustomValidity(DOMString error);
 
     readonly attribute NodeList labels;
 };