Update protobuf to r428, part 1.

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

Index: third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_message.h
===================================================================
--- third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_message.h	(revision 216642)
+++ third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_message.h	(working copy)
@@ -38,6 +38,7 @@
 #include <string>
 #include <google/protobuf/stubs/common.h>
 #include <google/protobuf/compiler/cpp/cpp_field.h>
+#include <google/protobuf/compiler/cpp/cpp_options.h>
 
 namespace google {
 namespace protobuf {
@@ -57,7 +58,7 @@
  public:
   // See generator.cc for the meaning of dllexport_decl.
   explicit MessageGenerator(const Descriptor* descriptor,
-                            const string& dllexport_decl);
+                            const Options& options);
   ~MessageGenerator();
 
   // Header stuff.
@@ -153,7 +154,7 @@
 
   const Descriptor* descriptor_;
   string classname_;
-  string dllexport_decl_;
+  Options options_;
   FieldGeneratorMap field_generators_;
   scoped_array<scoped_ptr<MessageGenerator> > nested_generators_;
   scoped_array<scoped_ptr<EnumGenerator> > enum_generators_;