[Font Load Events] Partial implementation of SetClass operations for FontFaceSet

Source/core/css/FontFaceSet.idl

 /*
  * Copyright (C) 2013 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 28 matching lines @@
 
     attribute EventHandler onloading;
     attribute EventHandler onloadingdone;
     attribute EventHandler onloadingerror;
 
     [RaisesException] sequence<FontFace> match(DOMString font, [Default=NullString] optional DOMString text);
     [RaisesException] boolean check(DOMString font, [Default=NullString] optional DOMString text);
     [RaisesException] Promise load(DOMString font, [Default=NullString] optional DOMString text);
     Promise ready();
 
+    void forEach(FontFaceSetForEachCallback callback, optional any thisArg);
+    [RaisesException] boolean has(FontFace fontFace);
+    // FIXME: implement them
+    // void add(FontFace fontFace);
+    // void clear();
+    // boolean delete(FontFace fontFace);
+
+    readonly attribute unsigned long size;
     readonly attribute FontFaceSetLoadStatus status;
 };