[Intl] Change PluralRules.prototype.resolvedOptions to return newly created...

[Intl] Change PluralRules.prototype.resolvedOptions to return newly created array for pluralCategories

Test: test262/intl402/PluralRules/prototype/resolvedOptions/pluralCategories

Bug: v8:7830
Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
Change-Id: Ie527f51fab67e63cf5bf56a1da883a3e16ce48ac
Reviewed-on: https://chromium-review.googlesource.com/1132339Reviewed-by: Sathya Gunasekaran <gsathya@chromium.org>
Commit-Queue: Frank Tang <ftang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#54477}

src/js/intl.js

@@ -29,6 +29,7 @@ var GlobalIntlv8BreakIterator = GlobalIntl.v8BreakIterator;
 var GlobalNumber = global.Number;
 var GlobalRegExp = global.RegExp;
 var GlobalString = global.String;
+var GlobalArray = global.Array;
 var IntlFallbackSymbol = utils.ImportNow("intl_fallback_symbol");
 var InternalArray = utils.InternalArray;
 var MathMax = global.Math.max;
@@ -38,6 +39,7 @@ var patternSymbol = utils.ImportNow("intl_pattern_symbol");
 var resolvedSymbol = utils.ImportNow("intl_resolved_symbol");
 var StringSubstr = GlobalString.prototype.substr;
 var StringSubstring = GlobalString.prototype.substring;
+var ArraySlice = GlobalArray.prototype.slice;
 
 utils.Import(function(from) {
   ArrayJoin = from.ArrayJoin;
@@ -1207,8 +1209,7 @@ DEFINE_METHOD(
     }
 
     defineWECProperty(result, 'pluralCategories',
-                      this[resolvedSymbol].pluralCategories);
-
+        %_Call(ArraySlice, this[resolvedSymbol].pluralCategories));
     return result;
   }
 );

test/test262/test262.status

@@ -503,9 +503,6 @@
   # https://bugs.chromium.org/p/v8/issues/detail?id=7781
   'built-ins/Date/parse/time-value-maximum-range': [FAIL],
 
-  # https://bugs.chromium.org/p/v8/issues/detail?id=7830
-  'intl402/PluralRules/prototype/resolvedOptions/pluralCategories': [FAIL],
-
   # https://bugs.chromium.org/p/v8/issues/detail?id=7831
   'language/statements/generators/generator-created-after-decl-inst': [FAIL],
   'language/expressions/generators/generator-created-after-decl-inst': [FAIL],