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

We have some 2.4 versions on the windows buildbots, I will try to have these updated and reapply.
Review URL: http://codereview.chromium.org/6821069

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@7583 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

test/mjsunit/testcfg.py

@@ -107,7 +107,7 @@ class MjsunitTestCase(test.TestCase):
     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):

test/sputnik/testcfg.py

@@ -57,7 +57,7 @@ class SputnikTestCase(test.TestCase):
 
   def AfterRun(self, result):
     # Dispose the temporary file if everything looks okay.
-    if result is None or not result.HasPreciousOutput(): self.tmpfile.Dispose()
+    if not result.HasPreciousOutput(): self.tmpfile.Dispose()
     self.tmpfile = None
 
   def GetCommand(self):

tools/test.py

@@ -117,8 +117,6 @@ class ProgressIndicator(object):
         start = time.time()
         output = case.Run()
         case.duration = (time.time() - start)
-      except BreakNowException:
-        self.terminate = True
       except IOError, e:
         assert self.terminate
         return
@@ -320,12 +318,6 @@ PROGRESS_INDICATORS = {
 # --- F r a m e w o r k ---
 # -------------------------
 
-class BreakNowException(Exception):
-  def __init__(self, value):
-    self.value = value
-  def __str__(self):
-    return repr(self.value)
-
 
 class CommandOutput(object):
 
@@ -387,12 +379,9 @@ class TestCase(object):
 
   def Run(self):
     self.BeforeRun()
-    result = None;
+    result = "exception"
     try:
       result = self.RunCommand(self.GetCommand())
-    except:
-      self.terminate = True;
-      raise BreakNowException("Used pressed CTRL+C or IO went wrong")
     finally:
       self.AfterRun(result)
     return result
@@ -713,12 +702,7 @@ class Context(object):
 
 def RunTestCases(cases_to_run, progress, tasks):
   progress = PROGRESS_INDICATORS[progress](cases_to_run)
-  result = 0;
-  try:
-    result = progress.Run(tasks)
-  except Exception, e:
-    print "\n", e
-  return result
+  return progress.Run(tasks)
 
 
 def BuildRequirements(context, requirements, mode, scons_flags):