Python 3 compatibility

test/variables/commands/gyptest-commands-ignore-env.py

 #!/usr/bin/env python
 
 # Copyright (c) 2012 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.
 
 """
 Test that environment variables are ignored when --ignore-environment is
 specified.
 """
 
+from __future__ import print_function
 import os
 
 import TestGyp
 
 test = TestGyp.TestGyp(format='gypd')
 
 os.environ['GYP_DEFINES'] = 'FOO=BAR'
 os.environ['GYP_GENERATORS'] = 'foo'
 os.environ['GYP_GENERATOR_FLAGS'] = 'genflag=foo'
 os.environ['GYP_GENERATOR_OUTPUT'] = 'somedir'
@@ skipping 10 matching lines @@
 # Normally, we should canonicalize line endings in the expected
 # contents file setting the Subversion svn:eol-style to native,
 # but that would still fail if multiple systems are sharing a single
 # workspace on a network-mounted file system.  Consequently, we
 # massage the Windows line endings ('\r\n') in the output to the
 # checked-in UNIX endings ('\n').
 
 contents = test.read('commands.gypd').replace('\r', '')
 expect = test.read('commands.gypd.golden').replace('\r', '')
 if not test.match(contents, expect):
-  print "Unexpected contents of `commands.gypd'"
+  print("Unexpected contents of `commands.gypd'")
   test.diff(expect, contents, 'commands.gypd ')
   test.fail_test()
 
 test.pass_test()