Update //third_party/protobuf to version 3.

third_party/protobuf/csharp/src/Google.Protobuf.Test/CodedInputStreamExtensions.cs

Index: third_party/protobuf/csharp/src/Google.Protobuf.Test/CodedInputStreamExtensions.cs
diff --git a/third_party/protobuf/python/google/protobuf/internal/more_messages.proto b/third_party/protobuf/csharp/src/Google.Protobuf.Test/CodedInputStreamExtensions.cs
similarity index 68%
copy from third_party/protobuf/python/google/protobuf/internal/more_messages.proto
copy to third_party/protobuf/csharp/src/Google.Protobuf.Test/CodedInputStreamExtensions.cs
index c701b4460b761a7f9db44e1159a1aadf7206a64a..23af28870ab4bc62fa76a582ac75172a5b4206a7 100644
--- a/third_party/protobuf/python/google/protobuf/internal/more_messages.proto
+++ b/third_party/protobuf/csharp/src/Google.Protobuf.Test/CodedInputStreamExtensions.cs
@@ -1,6 +1,7 @@
+#region Copyright notice and license
 // Protocol Buffers - Google's data interchange format
-// Copyright 2008 Google Inc.  All rights reserved.
-// http://code.google.com/p/protobuf/
+// Copyright 2015 Google Inc.  All rights reserved.
+// 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
@@ -27,25 +28,26 @@
 // 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.
+#endregion
 
-// Author: robinson@google.com (Will Robinson)
+using NUnit.Framework;
 
+namespace Google.Protobuf
+{
+    internal static class CodedInputStreamExtensions
+    {
+        public static void AssertNextTag(this CodedInputStream input, uint expectedTag)
+        {
+            uint tag = input.ReadTag();
+            Assert.AreEqual(expectedTag, tag);
+        }
 
-package google.protobuf.internal;
-
-// A message where tag numbers are listed out of order, to allow us to test our
-// canonicalization of serialized output, which should always be in tag order.
-// We also mix in some extensions for extra fun.
-message OutOfOrderFields {
-  optional   sint32 optional_sint32   =  5;
-  extensions 4 to 4;
-  optional   uint32 optional_uint32   =  3;
-  extensions 2 to 2;
-  optional    int32 optional_int32    =  1;
-};
-
-
-extend OutOfOrderFields {
-  optional   uint64 optional_uint64   =  4;
-  optional    int64 optional_int64    =  2;
+        public static T ReadMessage<T>(this CodedInputStream stream, MessageParser<T> parser)
+            where T : IMessage<T>
+        {
+            var message = parser.CreateTemplate();
+            stream.ReadMessage(message);
+            return message;
+        }
+    }
 }