Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/src/google/protobuf/wrappers.proto

 // 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
 // notice, this list of conditions and the following disclaimer.
@@ skipping 25 matching lines @@
 syntax = "proto3";
 
 package google.protobuf;
 
 option csharp_namespace = "Google.Protobuf.WellKnownTypes";
 option cc_enable_arenas = true;
 option go_package = "github.com/golang/protobuf/ptypes/wrappers";
 option java_package = "com.google.protobuf";
 option java_outer_classname = "WrappersProto";
 option java_multiple_files = true;
+option java_generate_equals_and_hash = true;
 option objc_class_prefix = "GPB";
 
 // Wrapper message for `double`.
 //
 // The JSON representation for `DoubleValue` is JSON number.
 message DoubleValue {
   // The double value.
   double value = 1;
 }
 
@@ skipping 53 matching lines @@
   string value = 1;
 }
 
 // Wrapper message for `bytes`.
 //
 // The JSON representation for `BytesValue` is JSON string.
 message BytesValue {
   // The bytes value.
   bytes value = 1;
 }