Add use counters for lots of DOM APIs.

third_party/WebKit/Source/core/dom/Text.idl

 /*
  * Copyright (C) 2006 Apple Computer, Inc.
  *
  * 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
@@ skipping 10 matching lines @@
 
 [
     Constructor(optional DOMString data = ""),
     ConstructorCallWith=Document,
 ] interface Text : CharacterData {
     [NewObject, DoNotTestNewObject, RaisesException] Text splitText(unsigned long offset);
     [MeasureAs=TextWholeText] readonly attribute DOMString wholeText;
 
     // Mixin Slotable
     // https://dom.spec.whatwg.org/#mixin-slotable
-    [ImplementedAs=assignedSlotForBinding] readonly attribute HTMLSlotElement? assignedSlot;
+    [Measure, ImplementedAs=assignedSlotForBinding] readonly attribute HTMLSlotElement? assignedSlot;
 
     // Non-standard API:
-    NodeList getDestinationInsertionPoints();
+    [Measure] NodeList getDestinationInsertionPoints();
 };