[ABANDONED] Implement Promises.

LayoutTests/fast/js/Promise-static-some-expected.txt

Index: LayoutTests/fast/js/Promise-static-some-expected.txt
diff --git a/LayoutTests/fast/js/Promise-static-some-expected.txt b/LayoutTests/fast/js/Promise-static-some-expected.txt
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+Test Promise.
+
+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
+
+PASS result is undefined
+PASS Promise.some() is fulfilled.
+PASS result is undefined
+PASS Promise.some(p6, p7, p8) is rejected.
+PASS result.length is 3
+PASS result[0] is "p6"
+PASS result[1] is "p7"
+PASS result[2] is "p8"
+PASS Promise.some(p6, p7, p1) is fulfilled.
+PASS result is "p1"
+PASS successfullyParsed is true
+
+TEST COMPLETE
+