An API returning a Promise should not throw an exceptions [overload version]

Source/bindings/tests/idls/modules/TestPartialInterface3.idl

 /*
  * Copyright (C) 2014 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 19 matching lines @@
 
 [
     ImplementedAs=TestPartialInterfaceImplementation3,
     PerContextEnabled=PartialContextName3,
 ] partial interface TestInterface {
     const unsigned short PARTIAL3_UNSIGNED_SHORT = 0;
 
     void voidMethodPartialOverload(DOMString value);
     static void staticVoidMethodPartialOverload(DOMString value);
 
+    Promise promiseMethodPartialOverload(Document document);
+    static Promise staticPromiseMethodPartialOverload(DOMString value);
+
     void partial2VoidMethod(DOMString value);
     void partial2VoidMethod(Node node);
     static void partial2StaticVoidMethod(DOMString value);
 };