[builtins] take slow path in IsConcatSpreadable if proxy in prototype

test/test262/test262.status

 # Copyright 2011 the V8 project authors. All rights reserved.
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@@ skipping 388 matching lines @@
   'annexB/built-ins/Object/prototype/__lookupGetter__/lookup-proto-data': [FAIL],
   'annexB/built-ins/Object/prototype/__lookupGetter__/lookup-proto-get-err': [FAIL],
   'annexB/built-ins/Object/prototype/__lookupGetter__/lookup-proto-proto-err': [FAIL],
   'annexB/built-ins/Object/prototype/__lookupSetter__/lookup-own-data': [FAIL],
   'annexB/built-ins/Object/prototype/__lookupSetter__/lookup-own-get-err': [FAIL],
   'annexB/built-ins/Object/prototype/__lookupSetter__/lookup-own-proto-err': [FAIL],
   'annexB/built-ins/Object/prototype/__lookupSetter__/lookup-proto-data': [FAIL],
   'annexB/built-ins/Object/prototype/__lookupSetter__/lookup-proto-get-err': [FAIL],
   'annexB/built-ins/Object/prototype/__lookupSetter__/lookup-proto-proto-err': [FAIL],
 
-  # https://bugs.chromium.org/p/v8/issues/detail?id=5134
-  'built-ins/Array/prototype/concat/is-concat-spreadable-is-array-proxy-revoked': [FAIL],
-
   # https://bugs.chromium.org/p/v8/issues/detail?id=4451
   'annexB/language/eval-code/direct/global-block-decl-eval-global-exsting-global-init': [FAIL],
   'annexB/language/eval-code/direct/global-if-decl-else-decl-a-eval-global-exsting-global-init': [FAIL],
   'annexB/language/eval-code/direct/global-if-decl-else-decl-b-eval-global-exsting-global-init': [FAIL],
   'annexB/language/eval-code/direct/global-if-decl-else-stmt-eval-global-exsting-global-init': [FAIL],
   'annexB/language/eval-code/direct/global-if-decl-no-else-eval-global-exsting-global-init': [FAIL],
   'annexB/language/eval-code/direct/global-if-stmt-else-decl-eval-global-exsting-global-init': [FAIL],
   'annexB/language/eval-code/direct/global-switch-case-eval-global-exsting-global-init': [FAIL],
   'annexB/language/eval-code/direct/global-switch-dflt-eval-global-exsting-global-init': [FAIL],
   'annexB/language/eval-code/indirect/global-block-decl-eval-global-exsting-global-init': [FAIL],
@@ skipping 176 matching lines @@
 }],  # asan == True
 
 ['asan == True or msan == True or tsan == True', {
   # https://bugs.chromium.org/p/v8/issues/detail?id=4639
   # The failed allocation causes an asan/msan/tsan error
   'built-ins/ArrayBuffer/allocation-limit': [SKIP],
   'built-ins/ArrayBuffer/length-is-too-large-throws': [SKIP],
 }],  # asan == True or msan == True or tsan == True
 
 ]