Update third_party/protobuf to protobuf-v3.0.0-beta-3

third_party/protobuf/csharp/src/Google.Protobuf.Test/Reflection/FieldAccessTest.cs

 #region Copyright notice and license
 // Protocol Buffers - Google's data interchange format
 // 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
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
@@ skipping 110 matching lines @@
         [Test]
         public void SetValue_SingleFields()
         {
             // Just a sample (primitives, messages, enums, strings, byte strings)
             var message = SampleMessages.CreateFullTestAllTypes();
             var fields = TestAllTypes.Descriptor.Fields;
             fields[TestAllTypes.SingleBoolFieldNumber].Accessor.SetValue(message, false);
             fields[TestAllTypes.SingleInt32FieldNumber].Accessor.SetValue(message, 500);
             fields[TestAllTypes.SingleStringFieldNumber].Accessor.SetValue(message, "It's a string");
             fields[TestAllTypes.SingleBytesFieldNumber].Accessor.SetValue(message, ByteString.CopyFrom(99, 98, 97));
-            fields[TestAllTypes.SingleForeignEnumFieldNumber].Accessor.SetValue(message, ForeignEnum.FOREIGN_FOO);
+            fields[TestAllTypes.SingleForeignEnumFieldNumber].Accessor.SetValue(message, ForeignEnum.ForeignFoo);
             fields[TestAllTypes.SingleForeignMessageFieldNumber].Accessor.SetValue(message, new ForeignMessage { C = 12345 });
             fields[TestAllTypes.SingleDoubleFieldNumber].Accessor.SetValue(message, 20150701.5);
 
             var expected = new TestAllTypes(SampleMessages.CreateFullTestAllTypes())
             {
                 SingleBool = false,
                 SingleInt32 = 500,
                 SingleString = "It's a string",
                 SingleBytes = ByteString.CopyFrom(99, 98, 97),
-                SingleForeignEnum = ForeignEnum.FOREIGN_FOO,
+                SingleForeignEnum = ForeignEnum.ForeignFoo,
                 SingleForeignMessage = new ForeignMessage { C = 12345 },
                 SingleDouble = 20150701.5
             };
 
             Assert.AreEqual(expected, message);
         }
 
         [Test]
         public void SetValue_SingleFields_WrongType()
         {
@@ skipping 57 matching lines @@
 
         [Test]
         public void FieldDescriptor_NotFound()
         {
             var descriptor = TestAllTypes.Descriptor;
             Assert.Throws<KeyNotFoundException>(() => descriptor.Fields[999999].ToString());
             Assert.Throws<KeyNotFoundException>(() => descriptor.Fields["not found"].ToString());
         }        
     }
 }