Implement Promise.fulfill, Promise.resolve and Promise.reject.

Source/core/dom/Promise.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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 [
    CustomConstructor(any init),
    EnabledAtRuntime=promise
 ] interface Promise {
    [Custom] Promise then(optional any fulfillCallback, optional any rejectCallback);
    [Custom] Promise catch(optional any rejectCallback);
 
+   [Custom] static Promise fulfill(any value);
+   [Custom] static Promise resolve(any value);
+   [Custom] static Promise reject(any value);
+
    [Custom] static Promise any(value... values);
    [Custom] static Promise every(value... values);
    [Custom] static Promise some(value... values);
 };