Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_service.h

 // 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 87 matching lines @@
   // Generate the CallMethod() method of the service.
   void GenerateCallMethod(io::Printer* printer);
 
   // Generate the Get{Request,Response}Prototype() methods.
   void GenerateGetPrototype(RequestOrResponse which, io::Printer* printer);
 
   // Generate the stub's implementations of the service methods.
   void GenerateStubMethods(io::Printer* printer);
 
   const ServiceDescriptor* descriptor_;
-  std::map<string, string> vars_;
+  map<string, string> vars_;
 
-  int index_in_metadata_;
-
-  friend class FileGenerator;
   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(ServiceGenerator);
 };
 
 }  // namespace cpp
 }  // namespace compiler
 }  // namespace protobuf
 
 }  // namespace google
 #endif  // GOOGLE_PROTOBUF_COMPILER_CPP_SERVICE_H__