Remove unnecessary coupling between Promise tests and Object.observe

test/mjsunit/es6/promises.js

Index: test/mjsunit/es6/promises.js
diff --git a/test/mjsunit/es6/promises.js b/test/mjsunit/es6/promises.js
index 63b6d2f94a9a7ec0799a7ef766845675dc8466fb..e3aeb70561a034c5387563ad850428a91db153f5 100644
--- a/test/mjsunit/es6/promises.js
+++ b/test/mjsunit/es6/promises.js
@@ -29,7 +29,6 @@
 
 // Make sure we don't rely on functions patchable by monkeys.
 var call = Function.prototype.call.call.bind(Function.prototype.call)
-var observe = Object.observe;
 var getOwnPropertyNames = Object.getOwnPropertyNames;
 var defineProperty = Object.defineProperty;
 var numberPrototype = Number.prototype;
@@ -88,8 +87,7 @@ function assertAsync(b, s) {
 
 function assertAsyncDone(iteration) {
   var iteration = iteration || 0
-  var dummy = {}
-  observe(dummy,
+  Promise.resolve().then(

[rossberg, 2015/07/21 10:25:37]

Some of the tests now become a bit circular (relying on the correctness of
Promise.resolve/then to test the correctness of Promise.resolve/then). But I
don't have a better idea either.

[adamk, 2015/07/21 16:18:08]

I could switch them all to use %EnqueueMicrotask, if you'd prefer.

[rossberg, 2015/07/21 16:28:43]

Aw, of course. For some reason I though that can't be done, but I don't know
what I was thinking. :\  Please do.

     function() {
       if (asyncAssertsExpected === 0)
         assertAsync(true, "all")
@@ -99,7 +97,6 @@ function assertAsyncDone(iteration) {
         assertAsyncDone(iteration + 1)
     }
   )
-  dummy.dummy = dummy
 }