Revert 7581, you can't have try except finally toghetter until python 2.5

test/mjsunit/testcfg.py

 # 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
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 89 matching lines @@
               'value': value.replace('\\', '\\\\').replace('\'', '\\\'') }
     try:
       os.write(fd_self_script, MakeJsConst('TEST_FILE_NAME', self.file))
     except IOError, e:
       test.PrintError("write() " + str(e))
     os.close(fd_self_script)
     self.self_script = self_script
     return self_script
 
   def AfterRun(self, result):
-    if self.self_script and (result is None or (not result.HasPreciousOutput())):
+    if self.self_script and (not result.HasPreciousOutput()):
       test.CheckedUnlink(self.self_script)
 
 class MjsunitTestConfiguration(test.TestConfiguration):
 
   def __init__(self, context, root):
     super(MjsunitTestConfiguration, self).__init__(context, root)
 
   def Ls(self, path):
     def SelectTest(name):
       return name.endswith('.js') and name != 'mjsunit.js'
@@ skipping 26 matching lines @@
 
   def GetTestStatus(self, sections, defs):
     status_file = join(self.root, 'mjsunit.status')
     if exists(status_file):
       test.ReadConfigurationInto(status_file, sections, defs)
 
 
 
 def GetConfiguration(context, root):
   return MjsunitTestConfiguration(context, root)