Update //third_party/protobuf to version 3.

third_party/protobuf/src/google/protobuf/arena_nc_test.py

-#! /usr/bin/python
+#! /usr/bin/env python
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.
-# http://code.google.com/p/protobuf/
+# https://developers.google.com/protocol-buffers/
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
 # in the documentation and/or other materials provided with the
 # distribution.
 #     * Neither the name of Google Inc. nor the names of its
 # contributors may be used to endorse or promote products derived from
 # this software without specific prior written permission.
 #
 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-"""Tests for google.protobuf.internal.message_cpp."""
-
-__author__ = 'shahms@google.com (Shahms King)'
-
-import os
-os.environ['PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION'] = 'cpp'
+"""Negative compilation unit tests for arena API."""
 
 import unittest
-from google.protobuf.internal.message_test import *
 
+from google3.testing.pybase import fake_target_util
+import unittest
+
+
+class ArenaNcTest(unittest.TestCase):
+
+  def testCompilerErrors(self):
+    """Runs a list of tests to verify compiler error messages."""
+
+    # Defines a list of test specs, where each element is a tuple
+    # (test name, list of regexes for matching the compiler errors).
+    test_specs = [
+        ('ARENA_PRIVATE_CONSTRUCTOR',
+         [r'calling a protected constructor']),
+        ('SANITY', None)]
+
+    fake_target_util.AssertCcCompilerErrors(
+        self,                         # The current test case.
+        'google3/google/protobuf/arena_nc',  # The fake target file.
+        'arena_nc.o',                 # The sub-target to build.
+        test_specs                    # List of test specifications.
+        )
 
 if __name__ == '__main__':
   unittest.main()