Object.observe/unobserve now return object

test/mjsunit/harmony/object-observe.js

Index: test/mjsunit/harmony/object-observe.js
diff --git a/test/mjsunit/harmony/object-observe.js b/test/mjsunit/harmony/object-observe.js
index e2cc3f9d45bcdc29da5526e2afdfaf6e68e6b31a..922a5f3dc7e8816172de64d3e76065a7a666cfba 100644
--- a/test/mjsunit/harmony/object-observe.js
+++ b/test/mjsunit/harmony/object-observe.js
@@ -98,10 +98,12 @@ Object.defineProperty(changeRecordWithAccessor, 'name', {
 assertThrows(function() { Object.observe("non-object", observer.callback); }, TypeError);
 assertThrows(function() { Object.observe(obj, nonFunction); }, TypeError);
 assertThrows(function() { Object.observe(obj, frozenFunction); }, TypeError);
+assertEquals(obj, Object.observe(obj, observer.callback));
 
 // Object.unobserve
 assertThrows(function() { Object.unobserve(4, observer.callback); }, TypeError);
 assertThrows(function() { Object.unobserve(obj, nonFunction); }, TypeError);
+assertEquals(obj, Object.unobserve(obj, observer.callback));
 
 // Object.getNotifier
 var notifier = Object.getNotifier(obj);