Merge the Sky Engine changes from the SkyDart branch

sky/engine/core/css/FontFace.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 21 matching lines @@
 
 enum FontFaceLoadStatus {
     "unloaded",
     "loading",
     "loaded",
     "error"
 };
 
 [
     // FIXME: should be union type http://crbug.com/240176
-    Constructor(DOMString family, DOMString source, optional Dictionary descriptors),
-    Constructor(DOMString family, ArrayBuffer source, optional Dictionary descriptors),
-    Constructor(DOMString family, ArrayBufferView source, optional Dictionary descriptors),
+    // FIXME(Dictionary): descriptors
+    Constructor(DOMString family, DOMString source),
     ConstructorCallWith=ExecutionContext,
 ] interface FontFace {
 
     [RaisesException=Setter, SetterCallWith=ExecutionContext] attribute DOMString family;
     [RaisesException=Setter, SetterCallWith=ExecutionContext] attribute DOMString style;
     [RaisesException=Setter, SetterCallWith=ExecutionContext] attribute DOMString weight;
     [RaisesException=Setter, SetterCallWith=ExecutionContext] attribute DOMString stretch;
     [RaisesException=Setter, SetterCallWith=ExecutionContext] attribute DOMString unicodeRange;
     [RaisesException=Setter, SetterCallWith=ExecutionContext] attribute DOMString variant;
     [RaisesException=Setter, SetterCallWith=ExecutionContext] attribute DOMString featureSettings;
 
     readonly attribute FontFaceLoadStatus status;
-    [CallWith=ScriptState] readonly attribute Promise loaded;
-
-    [CallWith=ScriptState] Promise load();
 };