Add use counters for lots of DOM APIs.

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

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
  *     documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 // https://html.spec.whatwg.org/#the-output-element
 
 interface HTMLOutputElement : HTMLElement {
-    [CEReactions, PutForwards=value] readonly attribute DOMTokenList htmlFor;
-    [ImplementedAs=formOwner] readonly attribute HTMLFormElement? form;
-    [CEReactions, Reflect] attribute DOMString name;
+  [Measure, CEReactions, PutForwards=value] readonly attribute DOMTokenList htmlFor;
+  [Measure, ImplementedAs=formOwner] readonly attribute HTMLFormElement? form;
+  [Measure, CEReactions, Reflect] attribute DOMString name;
 
-    readonly attribute DOMString type;
-    [CEReactions] attribute DOMString defaultValue;
-    [CEReactions] attribute DOMString value;
+    [Measure] readonly attribute DOMString type;
+  [Measure, CEReactions] attribute DOMString defaultValue;
+  [Measure, CEReactions] attribute DOMString value;
 
-    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;
 };