Python 3 compatibility

test/no-cpp/gyptest-no-cpp.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.
 
 """
 Checks that C-only targets aren't linked against libstdc++.
 """
 
 import TestGyp
 
 import re
 import subprocess
 import sys
 
 # set |match| to ignore build stderr output.
 test = TestGyp.TestGyp(match = lambda a, b: True)
 if sys.platform != 'win32' and test.format != 'make':
   # TODO: This doesn't pass with make.
   # TODO: Does a test like this make sense with Windows?
 
   CHDIR = 'src'
   test.run_gyp('test.gyp', chdir=CHDIR)
   test.build('test.gyp', 'no_cpp', chdir=CHDIR)
 
   def LinksLibStdCpp(path):
     path = test.built_file_path(path, chdir=CHDIR)
     if sys.platform == 'darwin':
-      proc = subprocess.Popen(['otool', '-L', path], stdout=subprocess.PIPE)
+      proc = subprocess.Popen(['otool', '-L', path], stdout=subprocess.PIPE,
+          universal_newlines=True)
     else:
-      proc = subprocess.Popen(['ldd', path], stdout=subprocess.PIPE)
+      proc = subprocess.Popen(['ldd', path], stdout=subprocess.PIPE,
+          universal_newlines=True)
     output = proc.communicate()[0]
     assert not proc.returncode
     return 'libstdc++' in output or 'libc++' in output
 
   if LinksLibStdCpp('no_cpp'):
     test.fail_test()
 
   build_error_code = {
     'xcode': [1, 65],  # 1 for xcode 3, 65 for xcode 4 (see `man sysexits`)
     'make': 2,
     'ninja': 1,
     'cmake': 0,  # CMake picks the compiler driver based on transitive checks.
     'xcode-ninja': [1, 65],
   }[test.format]
 
   test.build('test.gyp', 'no_cpp_dep_on_cc_lib', chdir=CHDIR,
              status=build_error_code)
 
   test.pass_test()