Pre-create properties on JSRegExp objects

test/mjsunit/mirror-regexp.js

Index: test/mjsunit/mirror-regexp.js
diff --git a/test/mjsunit/mirror-regexp.js b/test/mjsunit/mirror-regexp.js
index 8c834bf38b4857227cc804bf19b9dba91ce8a7fa..d6a9d71024544b567d0fc44f1e8ac7b9bb8958f0 100644
--- a/test/mjsunit/mirror-regexp.js
+++ b/test/mjsunit/mirror-regexp.js
@@ -70,8 +70,8 @@ function testRegExpMirror(r) {
   assertEquals('regexp', mirror.type());
   assertFalse(mirror.isPrimitive());
   for (var p in expected_attributes) {
-    assertEquals(mirror.property(p).attributes(),
-                 expected_attributes[p],
+    assertEquals(expected_attributes[p],
+                 mirror.property(p).attributes(),
                  p + ' attributes');
   }