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

third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_message.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 49 matching lines @@
 
 class MessageGenerator {
  public:
   // See generator.cc for the meaning of dllexport_decl.
   MessageGenerator(const Descriptor* descriptor, const Options& options);
   ~MessageGenerator();
 
   // Header stuff.
 
   // Return names for foward declarations of this class and all its nested
-  // types.
-  void FillMessageForwardDeclarations(set<string>* class_names);
-  void FillEnumForwardDeclarations(set<string>* enum_names);
+  // types. A given key in {class,enum}_names will map from a class name to the
+  // descriptor that was responsible for its inclusion in the map. This can be
+  // used to associate the descriptor with the code generated for it.
+  void FillMessageForwardDeclarations(
+      map<string, const Descriptor*>* class_names);
+  void FillEnumForwardDeclarations(
+      map<string, const EnumDescriptor*>* enum_names);
 
   // Generate definitions of all nested enums (must come before class
   // definitions because those classes use the enums definitions).
   void GenerateEnumDefinitions(io::Printer* printer);
 
   // Generate specializations of GetEnumDescriptor<MyEnum>().
   // Precondition: in ::google::protobuf namespace.
   void GenerateGetEnumDescriptorSpecializations(io::Printer* printer);
 
   // Generate definitions for this class and all its nested types.
@@ skipping 112 matching lines @@
 
   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(MessageGenerator);
 };
 
 }  // namespace cpp
 }  // namespace compiler
 }  // namespace protobuf
 
 }  // namespace google
 #endif  // GOOGLE_PROTOBUF_COMPILER_CPP_MESSAGE_H__