Python 3 compatibility

test/configurations/target_platform/gyptest-target_platform.py

 #!/usr/bin/env python
 
 # Copyright (c) 2009 Google Inc. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """
 Tests the msvs specific msvs_target_platform option.
 """
 
 import TestGyp
 import TestCommon
 
 
 def RunX64(exe, stdout):
   try:
     test.run_built_executable(exe, stdout=stdout)
-  except WindowsError, e:
+  except WindowsError as e:
     # Assume the exe is 64-bit if it can't load on 32-bit systems.
     # Both versions of the error are required because different versions
     # of python seem to return different errors for invalid exe type.
     if e.errno != 193 and '[Error 193]' not in str(e):
       raise
 
 
 test = TestGyp.TestGyp(formats=['msvs'])
 
 test.run_gyp('configurations.gyp')
 
 test.set_configuration('Debug|x64')
 test.build('configurations.gyp', rebuild=True)
 RunX64('front_left', stdout=('left\n'))
 RunX64('front_right', stdout=('right\n'))
 
 test.set_configuration('Debug|Win32')
 test.build('configurations.gyp', rebuild=True)
 RunX64('front_left', stdout=('left\n'))
 test.run_built_executable('front_right', stdout=('right\n'))
 
 test.pass_test()