Debugger: use debug break slots instead of ICs (except for calls).

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 336 matching lines @@
   'regress/regress-91008': [SKIP],
   'regress/regress-91010': [SKIP],
   'regress/regress-91013': [SKIP],
   'regress/regress-99167': [SKIP],
 
   # Long running tests.
   'regress/regress-2185': [PASS, ['mode == debug', PASS, TIMEOUT]],
   'regress/regress-2185-2': [PASS, TIMEOUT],
   'whitespaces': [PASS, TIMEOUT, SLOW],
 
-  # BUG(v8:3147). It works on other architectures by accident.
-  'regress/regress-conditional-position': [FAIL],
-
   # BUG(v8:3457).
   'deserialize-reference': [PASS, FAIL],
 
   # BUG(v8:4016)
   'regress/regress-crbug-467047': [SKIP],
 
   # Slow tests.
   'array-concat': [PASS, SLOW],
   'array-constructor': [PASS, SLOW],
   'array-indexing': [PASS, SLOW],
@@ skipping 297 matching lines @@
   'regress/regress-2653': [SKIP],
 }],  # 'deopt_fuzzer == True'
 
 ##############################################################################
 ['arch == ppc and simulator_run == True or arch == ppc64 and simulator_run == True', {
 
   # take too long with the simulator.
   'regress/regress-1132': [SKIP],
 }],  # 'arch == ppc and simulator_run == True'
 ]