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

third_party/protobuf/csharp/src/AddressBook/ListPeople.cs

 #region Copyright notice and license
 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 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 37 matching lines @@
                 Console.WriteLine("  Name: {0}", person.Name);
                 if (person.Email != "")
                 {
                     Console.WriteLine("  E-mail address: {0}", person.Email);
                 }
 
                 foreach (Person.Types.PhoneNumber phoneNumber in person.Phones)
                 {
                     switch (phoneNumber.Type)
                     {
-                        case Person.Types.PhoneType.MOBILE:
+                        case Person.Types.PhoneType.Mobile:
                             Console.Write("  Mobile phone #: ");
                             break;
-                        case Person.Types.PhoneType.HOME:
+                        case Person.Types.PhoneType.Home:
                             Console.Write("  Home phone #: ");
                             break;
-                        case Person.Types.PhoneType.WORK:
+                        case Person.Types.PhoneType.Work:
                             Console.Write("  Work phone #: ");
                             break;
                     }
                     Console.WriteLine(phoneNumber.Number);
                 }
             }
         }
 
         /// <summary>
         /// Entry point - loads the addressbook and then displays it.
@@ skipping 15 matching lines @@
             // Read the existing address book.
             using (Stream stream = File.OpenRead(args[0]))
             {
                 AddressBook addressBook = AddressBook.Parser.ParseFrom(stream);
                 Print(addressBook);
             }
             return 0;
         }
     }
 }