Update //third_party/protobuf to version 3.

third_party/protobuf/ruby/lib/google/protobuf/message_exts.rb

Index: third_party/protobuf/ruby/lib/google/protobuf/message_exts.rb
diff --git a/third_party/protobuf/python/google/protobuf/internal/message_cpp_test.py b/third_party/protobuf/ruby/lib/google/protobuf/message_exts.rb
similarity index 78%
copy from third_party/protobuf/python/google/protobuf/internal/message_cpp_test.py
copy to third_party/protobuf/ruby/lib/google/protobuf/message_exts.rb
index 0d84b3207bdd0a5f5b7202e9ad67d6cfcf55e0d3..e10266ba2f3637d655c2de89c285558c987c613b 100644
--- a/third_party/protobuf/python/google/protobuf/internal/message_cpp_test.py
+++ b/third_party/protobuf/ruby/lib/google/protobuf/message_exts.rb
@@ -1,8 +1,6 @@
-#! /usr/bin/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 +28,26 @@
 # (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."""
+module Google
+  module Protobuf
+    module MessageExts
 
-__author__ = 'shahms@google.com (Shahms King)'
+      #this is only called in jruby; mri loades the ClassMethods differently
+      def self.included(klass)
+        klass.extend(ClassMethods)
+      end
 
-import os
-os.environ['PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION'] = 'cpp'
+      module ClassMethods
+      end
 
-import unittest
-from google.protobuf.internal.message_test import *
+      def to_json
+        self.class.encode_json(self)
+      end
 
+      def to_proto
+        self.class.encode(self)
+      end
 
-if __name__ == '__main__':
-  unittest.main()
+    end
+  end
+end