Move object literal checking into checker classes

test/test262/test262.status

 # Copyright 2011 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 33 matching lines @@
   'Sbp_A3_T2': [PASS, FAIL_OK],
   'Sbp_A4_T1': [PASS, FAIL_OK],
   'Sbp_A4_T2': [PASS, FAIL_OK],
   'Sbp_A5_T1': [PASS], # Test is broken (strict reference to unbound variable)
   'Sbp_A5_T2': [PASS, FAIL_OK],
 
   # Passes in ES6 since {__arr} syntax is parsed as object literal.
   'S12.1_A4_T2': [PASS, FAIL_OK],
   'S12.6.4_A15': [PASS, FAIL_OK],
 
+  # ES6 allows duplicate properties
+  '11.1.5-4-4-a-1-s': [FAIL],
+  '11.1.5_4-4-b-1': [FAIL],
+  '11.1.5_4-4-b-2': [FAIL],
+  '11.1.5_4-4-c-1': [FAIL],
+  '11.1.5_4-4-c-2': [FAIL],
+  '11.1.5_4-4-d-1': [FAIL],
+  '11.1.5_4-4-d-2': [FAIL],
+  '11.1.5_4-4-d-3': [FAIL],
+  '11.1.5_4-4-d-4': [FAIL],
+
   ######################## NEEDS INVESTIGATION ###########################
 
   # These test failures are specific to the intl402 suite and need investigation
   # to be either marked as bugs with issues filed for them or as deliberate
   # incompatibilities if the test cases turn out to be broken or ambiguous.
   '6.2.3': [FAIL],
   '9.2.1_2': [FAIL],
   '9.2.6_2': [FAIL],
   '10.1.1_a': [FAIL],
   '10.1.1_19_c': [PASS, FAIL, NO_VARIANTS],
@@ skipping 70 matching lines @@
 
   # BUG(3251225): Tests that timeout with --nocrankshaft.
   'S15.1.3.1_A2.4_T1': [SKIP],
   'S15.1.3.1_A2.5_T1': [SKIP],
   'S15.1.3.2_A2.4_T1': [SKIP],
   'S15.1.3.2_A2.5_T1': [SKIP],
   'S15.1.3.3_A2.3_T1': [SKIP],
   'S15.1.3.4_A2.3_T1': [SKIP],
 }],  # 'arch == arm or arch == mipsel or arch == mips or arch == arm64'
 ]