Integrated internal changes from Google
diff --git a/python/setup.py b/python/setup.py
index 70b7de5..efb74fe 100755
--- a/python/setup.py
+++ b/python/setup.py
@@ -78,6 +78,7 @@
 
 def GenerateUnittestProtos():
   generate_proto("../src/google/protobuf/any_test.proto", False)
+  generate_proto("../src/google/protobuf/map_proto2_unittest.proto", False)
   generate_proto("../src/google/protobuf/map_unittest.proto", False)
   generate_proto("../src/google/protobuf/test_messages_proto3.proto", False)
   generate_proto("../src/google/protobuf/test_messages_proto2.proto", False)