Python 3 compatibility

test/ios/gyptest-watch.py

 #!/usr/bin/env python
 
 # Copyright (c) 2014 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.
 
 """
 Verifies that ios watch extensions and apps are built correctly.
 """
 
+from __future__ import print_function
+
 import TestGyp
 import TestMac
 
 import sys
 
 if sys.platform == 'darwin':
-  print "This test is currently disabled: https://crbug.com/483696."
+  print("This test is currently disabled: https://crbug.com/483696.")
   sys.exit(0)
 
 
 if sys.platform == 'darwin' and TestMac.Xcode.Version() >= "0620":
   test = TestGyp.TestGyp(formats=['ninja', 'xcode'])
 
   test.run_gyp('watch.gyp', chdir='watch')
 
   test.build(
       'watch.gyp',
       'WatchContainer',
       chdir='watch')
 
   # Test that the extension exists
   test.built_file_must_exist(
       'WatchContainer.app/PlugIns/WatchKitExtension.appex',
       chdir='watch')
 
   # Test that the watch app exists
   test.built_file_must_exist(
       'WatchContainer.app/PlugIns/WatchKitExtension.appex/WatchApp.app',
       chdir='watch')
 
   test.pass_test()