Add use counters for lots of DOM APIs.

third_party/WebKit/Source/core/fileapi/FileReader.idl

 /*
  * Copyright (C) 2010 Google Inc.  All rights reserved.
  * Copyright (C) 2011 Apple 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
@@ skipping 21 matching lines @@
 // https://w3c.github.io/FileAPI/#APIASynch
 
 [
     ActiveScriptWrappable,
     DependentLifetime,
     Constructor,
     ConstructorCallWith=ExecutionContext,
     Exposed=(Window,Worker),
 ] interface FileReader : EventTarget {
     // async read methods
-    [RaisesException] void readAsArrayBuffer(Blob blob);
-    [RaisesException] void readAsBinaryString(Blob blob);
+    [RaisesException, Measure] void readAsArrayBuffer(Blob blob);
+    [RaisesException, Measure] void readAsBinaryString(Blob blob);
     [RaisesException] void readAsText(Blob blob, optional DOMString label);
     [RaisesException] void readAsDataURL(Blob blob);
 
     void abort();
 
     // states
     const unsigned short EMPTY = 0;
     const unsigned short LOADING = 1;
     const unsigned short DONE = 2;
 
     [ImplementedAs=getReadyState] readonly attribute unsigned short readyState;
 
     // File or Blob data
     readonly attribute (DOMString or ArrayBuffer)? result;
 
     // TODO(jsbell): Spec has DOMError, which is being deprecated.
     readonly attribute DOMException? error;
 
     // event handler attributes
     attribute EventHandler onloadstart;
     attribute EventHandler onprogress;
     attribute EventHandler onload;
     attribute EventHandler onabort;
     attribute EventHandler onerror;
     attribute EventHandler onloadend;
 };