Fix redefining of attributes on aliased arguments.

test/test262/test262.status

Index: test/test262/test262.status
diff --git a/test/test262/test262.status b/test/test262/test262.status
index 569f91786fdf436c24075960a8fc070f13bbd8fa..53f19d648e2a9812f42b4c6a64b0657e494ad146 100644
--- a/test/test262/test262.status
+++ b/test/test262/test262.status
@@ -42,19 +42,6 @@ S10.4.2.1_A1: FAIL
 15.2.3.6-4-415: FAIL
 15.2.3.6-4-420: FAIL
 
-# V8 Bug: http://code.google.com/p/v8/issues/detail?id=1772
-15.2.3.6-4-292-1: FAIL
-15.2.3.6-4-293-2: FAIL
-15.2.3.6-4-293-3: FAIL
-15.2.3.6-4-294-1: FAIL
-15.2.3.6-4-295-1: FAIL
-15.2.3.6-4-296-1: FAIL
-15.2.3.7-6-a-281: FAIL
-15.2.3.7-6-a-282: FAIL
-15.2.3.7-6-a-283: FAIL
-15.2.3.7-6-a-284: FAIL
-15.2.3.7-6-a-285: FAIL
-
 ##################### DELIBERATE INCOMPATIBILITIES #####################
 
 # We deliberately treat arguments to parseInt() with a leading zero as