Add use counters for lots of DOM APIs.

third_party/WebKit/Source/core/css/CSSPageRule.idl

 /*
  * Copyright (C) 2006, 2007 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 10 matching lines @@
 // https://dev.w3.org/csswg/cssom/#the-csspagerule-interface
 
 // TODO(foolip): CSSPageRule should inherit from CSSGroupingRule.
 // crbug.com/496381. To internally implement this as grouping rule,
 // margin at-rules should be implemented crbug.com/320370, since the
 // spec https://dev.w3.org/csswg/css-page/#at-page-rule allows only
 // margin at-rules inside @page.
 interface CSSPageRule : CSSRule {
     attribute DOMString selectorText;
     // TODO(foolip): style should have [PutForwards=cssText].
-    [SameObject] readonly attribute CSSStyleDeclaration style;
+    [SameObject, Measure] readonly attribute CSSStyleDeclaration style;
 };