Python 3 compatibility

test/win/gyptest-link-update-manifest.py

 #!/usr/bin/env python
 
 # Copyright (c) 2013 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.
 
 """
 Make sure binary is relinked when manifest settings are changed.
 """
 
@@ skipping 57 matching lines @@
         },
       },
     },
   ],
 }
 '''
 
   gypfile = 'update-manifest.gyp'
 
   def WriteAndUpdate(uac_execution_level, additional_manifest_files, do_build):
-    with open(os.path.join(CHDIR, gypfile), 'wb') as f:
+    with open(os.path.join(CHDIR, gypfile), 'w') as f:
       f.write(gyp_template % {
         'uac_execution_level': uac_execution_level,
         'additional_manifest_files': additional_manifest_files,
       })
     test.run_gyp(gypfile, chdir=CHDIR)
     if do_build:
       test.build(gypfile, chdir=CHDIR)
       exe_file = test.built_file_path('test_update_manifest.exe', chdir=CHDIR)
       return extract_manifest(exe_file, 1)
 
   manifest = WriteAndUpdate(0, '', True)
   test.fail_test('asInvoker' not in manifest)
   test.fail_test('35138b9a-5d96-4fbd-8e2d-a2440225f93a' in manifest)
 
   # Make sure that updating .gyp and regenerating doesn't cause a rebuild.
   WriteAndUpdate(0, '', False)
   test.up_to_date(gypfile, test.ALL, chdir=CHDIR)
 
   # But make sure that changing a manifest property does cause a relink.
   manifest = WriteAndUpdate(2, '', True)
   test.fail_test('requireAdministrator' not in manifest)
 
   # Adding a manifest causes a rebuild.
   manifest = WriteAndUpdate(2, 'extra.manifest', True)
   test.fail_test('35138b9a-5d96-4fbd-8e2d-a2440225f93a' not in manifest)