Python 3 compatibility

test/variables/filelist/gyptest-filelist.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 variable expansion of '<|(list.txt ...)' syntax commands.
 """
 
+from __future__ import print_function
+
 import os
 import sys
 
 import TestGyp
 
 test = TestGyp.TestGyp()
 
 CHDIR = 'src'
 test.run_gyp('filelist2.gyp', chdir=CHDIR)
 
 test.build('filelist2.gyp', 'foo', chdir=CHDIR)
 contents = test.read('src/dummy_foo').replace('\r', '')
 expect = 'John\nJacob\nJingleheimer\nSchmidt\n'
 if not test.match(contents, expect):
-  print "Unexpected contents of `src/dummy_foo'"
+  print("Unexpected contents of `src/dummy_foo'")
   test.diff(expect, contents, 'src/dummy_foo')
   test.fail_test()
 
 test.pass_test()