Update //third_party/protobuf to version 3.

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

Index: third_party/protobuf/src/google/protobuf/arena_nc_test.py
diff --git a/third_party/protobuf/python/google/protobuf/internal/message_cpp_test.py b/third_party/protobuf/src/google/protobuf/arena_nc_test.py
similarity index 64%
rename from third_party/protobuf/python/google/protobuf/internal/message_cpp_test.py
rename to third_party/protobuf/src/google/protobuf/arena_nc_test.py
index 0d84b3207bdd0a5f5b7202e9ad67d6cfcf55e0d3..87a69b2afd76e6a81adb30e44d7703280535f600 100644
--- a/third_party/protobuf/python/google/protobuf/internal/message_cpp_test.py
+++ b/third_party/protobuf/src/google/protobuf/arena_nc_test.py
@@ -1,8 +1,8 @@
-#! /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
@@ -30,16 +30,32 @@
 # (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."""
+"""Negative compilation unit tests for arena API."""
 
-__author__ = 'shahms@google.com (Shahms King)'
-
-import os
-os.environ['PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION'] = 'cpp'
+import unittest
 
+from google3.testing.pybase import fake_target_util
 import unittest
-from google.protobuf.internal.message_test import *
 
 
+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()