[es6] Add appropriate ToString call to String.prototype.normalize

test/test262-es6/test262-es6.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 719 matching lines @@
   # https://code.google.com/p/v8/issues/detail?id=4346
   'built-ins/RegExp/prototype/flags/*': [FAIL],
 
   # https://code.google.com/p/v8/issues/detail?id=4347
   'built-ins/RegExp/prototype/global/name': [FAIL],
   'built-ins/RegExp/prototype/ignoreCase/name': [FAIL],
   'built-ins/RegExp/prototype/multiline/name': [FAIL],
   'built-ins/RegExp/prototype/source/name': [FAIL],
   'built-ins/RegExp/prototype/sticky/name': [FAIL],
 
-  # https://code.google.com/p/v8/issues/detail?id=4350
-  # Some of these pass when i18n.js is not loaded and fail when it is
-  'built-ins/String/prototype/normalize/return-abrupt-from-form': [PASS, FAIL],
-  'built-ins/String/prototype/normalize/return-abrupt-from-form-as-symbol': [PASS, FAIL],
-  'built-ins/String/prototype/normalize/return-abrupt-from-this': [FAIL],
-  'built-ins/String/prototype/normalize/return-abrupt-from-this-as-symbol': [FAIL],
-  'built-ins/String/prototype/normalize/return-normalized-string-from-coerced-form': [PASS, FAIL],
-
   # https://code.google.com/p/v8/issues/detail?id=4360
   'intl402/Collator/10.1.1_1': [FAIL],
   'intl402/DateTimeFormat/12.1.1_1': [FAIL],
   'intl402/NumberFormat/11.1.1_1': [FAIL],
 
   # https://code.google.com/p/v8/issues/detail?id=4361
   'intl402/Collator/10.1.1_a': [FAIL],
 
   # https://code.google.com/p/v8/issues/detail?id=1972
   'language/identifiers/val-break-via-escape-hex': [FAIL],
@@ skipping 178 matching lines @@
 
   # BUG(3251225): Tests that timeout with --nocrankshaft.
   'built-ins/decodeURI/S15.1.3.1_A2.4_T1': [SKIP],
   'built-ins/decodeURI/S15.1.3.1_A2.5_T1': [SKIP],
   'built-ins/decodeURIComponent/S15.1.3.2_A2.4_T1': [SKIP],
   'built-ins/decodeURIComponent/S15.1.3.2_A2.5_T1': [SKIP],
   'built-ins/encodeURI/S15.1.3.3_A2.3_T1': [SKIP],
   'built-ins/encodeURIComponent/S15.1.3.4_A2.3_T1': [SKIP],
 }],  # 'arch == arm or arch == mipsel or arch == mips or arch == arm64'
 ]