Implement AP2 Promises

LayoutTests/fast/js/Promise-resolve-with-then-fulfill.html

Index: LayoutTests/fast/js/Promise-resolve-with-then-fulfill.html
diff --git a/LayoutTests/fast/js/Promise-resolve-with-then-fulfill.html b/LayoutTests/fast/js/Promise-resolve-with-then-fulfill.html
index 8e4a002b4daf8ca02d1bb62f5047bb5969cb8d67..35a027e3711739ffb5b785c7b26b272286f3c029 100644
--- a/LayoutTests/fast/js/Promise-resolve-with-then-fulfill.html
+++ b/LayoutTests/fast/js/Promise-resolve-with-then-fulfill.html
@@ -10,16 +10,14 @@
 description('Test Promise.');
 
 window.jsTestIsAsync = true;
-var callback;
 var value = {
   then: function(fulfillCallback, rejectCallback) {
     testPassed('value.then is called.');
     window.thisValue = this;
     shouldBe('thisValue', 'value');
-    callback = fulfillCallback;
+    fulfillCallback('hello');
   }
 };
-finishJSTest();
 var promise = new Promise(function(resolve) { resolve(value); });
 
 promise.then(function(result) {
@@ -34,7 +32,6 @@ promise.then(function(result) {
 
 debug('The promise is not fulfilled now.');
 
-callback('hello');
 </script>
 <script src="resources/js-test-post.js"></script>
 </body>