Revert "Never use classic code generator."

tools/test.py

 #!/usr/bin/env python
 #
 # Copyright 2008 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
@@ skipping 566 matching lines @@
 
   def __init__(self, name):
     self.name = name
 
   def GetName(self):
     return self.name
 
 
 # Use this to run several variants of the tests, e.g.:
 # VARIANT_FLAGS = [[], ['--always_compact', '--noflush_code']]
-VARIANT_FLAGS = [[],
-                 ['--stress-opt', '--always-opt'],
-                 ['--always-full-compiler']]
+VARIANT_FLAGS = [[], ['--stress-opt', '--always-opt'], ['--nocrankshaft']]
 
 
 class TestRepository(TestSuite):
 
   def __init__(self, path):
     normalized_path = abspath(path)
     super(TestRepository, self).__init__(basename(normalized_path))
     self.path = normalized_path
     self.is_loaded = False
     self.config = None
@@ skipping 881 matching lines @@
     for entry in timed_tests[:20]:
       t = FormatTime(entry.duration)
       sys.stderr.write("%4i (%s) %s\n" % (index, t, entry.GetLabel()))
       index += 1
 
   return result
 
 
 if __name__ == '__main__':
   sys.exit(Main())