Update //third_party/protobuf to version 3.

third_party/protobuf/python/google/protobuf/internal/service_reflection_test.py

Index: third_party/protobuf/python/google/protobuf/internal/service_reflection_test.py
diff --git a/third_party/protobuf/python/google/protobuf/internal/service_reflection_test.py b/third_party/protobuf/python/google/protobuf/internal/service_reflection_test.py
index e04f8252c0400e79846195ba15a969339a657bfb..98614b77f63ae80e3a0f03a9457b71ac0ffca7af 100755
--- a/third_party/protobuf/python/google/protobuf/internal/service_reflection_test.py
+++ b/third_party/protobuf/python/google/protobuf/internal/service_reflection_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
@@ -34,7 +34,10 @@
 
 __author__ = 'petar@google.com (Petar Petrov)'
 
-import unittest
+try:
+  import unittest2 as unittest
+except ImportError:
+  import unittest
 from google.protobuf import unittest_pb2
 from google.protobuf import service_reflection
 from google.protobuf import service
@@ -80,7 +83,7 @@ class FooUnitTest(unittest.TestCase):
     self.assertEqual('Method Bar not implemented.',
                      rpc_controller.failure_message)
     self.assertEqual(None, self.callback_response)
-    
+
     class MyServiceImpl(unittest_pb2.TestService):
       def Foo(self, rpc_controller, request, done):
         self.foo_called = True
@@ -118,15 +121,14 @@ class FooUnitTest(unittest.TestCase):
     rpc_controller = 'controller'
     request = 'request'
 
-    # GetDescriptor now static, still works as instance method for compatability
+    # GetDescriptor now static, still works as instance method for compatibility
     self.assertEqual(unittest_pb2.TestService_Stub.GetDescriptor(),
                      stub.GetDescriptor())
 
     # Invoke method.
     stub.Foo(rpc_controller, request, MyCallback)
 
-    self.assertTrue(isinstance(self.callback_response,
-                               unittest_pb2.FooResponse))
+    self.assertIsInstance(self.callback_response, unittest_pb2.FooResponse)
     self.assertEqual(request, channel.request)
     self.assertEqual(rpc_controller, channel.controller)
     self.assertEqual(stub.GetDescriptor().methods[0], channel.method)