[ABANDONED] Introduce Promise example implementation written in JavaScript.

LayoutTests/fast/js/Promise-get-expected.txt

Index: LayoutTests/fast/js/Promise-get-expected.txt
diff --git a/LayoutTests/fast/js/Promise-get-expected.txt b/LayoutTests/fast/js/Promise-get-expected.txt
new file mode 100644
index 0000000000000000000000000000000000000000..5e7f2d6d761974a527234a8fce8088cefb718765
--- /dev/null
+++ b/LayoutTests/fast/js/Promise-get-expected.txt
@@ -0,0 +1,14 @@
+Test Promise.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+PASS promise instanceof Promise is true
+PASS promise.get(12) is 34
+PASS promise.get(8) is 12
+PASS promise.value is undefined
+PASS promiseStatic instanceof Promise is true
+PASS promiseStatic.get(42) is 88
+PASS successfullyParsed is true
+
+TEST COMPLETE
+