[debugger] fix mjsunit/es6/debug-promises/stepin-constructor.js for ignition.

test/mjsunit/mjsunit.status

 # Copyright 2012 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 737 matching lines @@
 
   # take too long with the simulator.
   'regress/regress-1132': [SKIP],
 }],  # 'arch == ppc and simulator_run == True'
 
 ##############################################################################
 ['ignition == True', {
   # TODO(yangguo,4690): assertion failures in debugger tests.
   'debug-allscopes-on-debugger': [FAIL],
   'es6/debug-stepnext-for': [FAIL],
-  'es6/debug-promises/stepin-constructor': [FAIL],
   'es6/debug-stepin-proxies': [FAIL],
   'regress/regress-crbug-119800': [FAIL],
 
   # TODO(yangguo,4690): flaky failures on the bots.
   'debug-stepin-builtin-callback-opt': [SKIP],
 
    # TODO(rmcilroy,4765): assertion failures in LiveEdit tests.
   'debug-liveedit-restart-frame': [FAIL],
   'debug-liveedit-literals': [FAIL],
   'debug-liveedit-3': [FAIL],
@@ skipping 84 matching lines @@
 ##############################################################################
 ['gcov_coverage', {
   # Tests taking too long.
   'array-functions-prototype-misc': [SKIP],
 
   # Stack overflow.
   'big-array-literal': [SKIP],
 }],  # 'gcov_coverage'
 
 ]