Run format-webkit on webkitpy code (without string conversion).

third_party/WebKit/Tools/Scripts/webkitpy/common/net/networktransaction_unittest.py

 # Copyright (c) 2010 Google Inc. 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
@@ skipping 31 matching lines @@
     def _raise_exception(self):
         raise self.exception
 
     def test_exception(self):
         transaction = NetworkTransaction()
         did_process_exception = False
         did_throw_exception = True
         try:
             transaction.run(lambda: self._raise_exception())
             did_throw_exception = False
-        except Exception, e:
+        except Exception as e:
             did_process_exception = True
             self.assertEqual(e, self.exception)
         self.assertTrue(did_throw_exception)
         self.assertTrue(did_process_exception)
 
     def _raise_500_error(self):
         self._run_count += 1
         if self._run_count < 3:
             raise HTTPError("http://example.com/", 500, "internal server error", None, None)
         return 42
@@ skipping 16 matching lines @@
         self.assertIsNone(transaction.run(lambda: self._raise_404_error()))
 
     def test_timeout(self):
         self._run_count = 0
         transaction = NetworkTransaction(initial_backoff_seconds=60 * 60, timeout_seconds=60)
         did_process_exception = False
         did_throw_exception = True
         try:
             transaction.run(lambda: self._raise_500_error())
             did_throw_exception = False
-        except NetworkTimeout, e:
+        except NetworkTimeout as e:
             did_process_exception = True
         self.assertTrue(did_throw_exception)
         self.assertTrue(did_process_exception)