Correctly handlify Dictionary::CollectKeysTo.

test/mjsunit/mjsunit.status

 # Copyright 2012 the V8 project authors. All rights reserved.
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 # 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
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@@ skipping 350 matching lines @@
   'strong/load-proxy': [SKIP],
 
   # Slow tests.
   'array-constructor': [PASS, SLOW],
   'json': [PASS, SLOW],
   'regress/regress-446389': [PASS, SLOW],
   'regress/regress-inline-getter-near-stack-limit': [PASS, SLOW],
 
   # BUG(v8:3097)
   'debug-references': [SKIP],
-
-  # BUG(v8:4570)
-  'mjsunit/harmony/reflect-own-keys': [SKIP],
 }],  # 'gc_stress == True'
 
 ##############################################################################
 ['no_i18n == True and mode == debug', {
   # Tests too slow for no18n debug.
   'regress/regress-1200351': [SKIP],
 }],  # 'no_i18n == True and mode == debug'
 
 ##############################################################################
 ['byteorder == big', {
@@ skipping 687 matching lines @@
   'regress/regress-crbug-347903': [SKIP],
   'regress/regress-crbug-505007-1': [SKIP],
   'regress/regress-crbug-505007-2': [SKIP],
   'regress/short-circuit': [SKIP],
   'stack-traces-overflow': [SKIP],
   'unicodelctest': [SKIP],
   'unicodelctest-no-optimization': [SKIP],
 }],  # ignition == True and (arch == arm or arch == arm64)
 
 ]