Update protobuf to r428, part 1.

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

Index: third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_enum.h
===================================================================
--- third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_enum.h	(revision 216642)
+++ third_party/protobuf/src/google/protobuf/compiler/cpp/cpp_enum.h	(working copy)
@@ -36,8 +36,10 @@
 #define GOOGLE_PROTOBUF_COMPILER_CPP_ENUM_H__
 
 #include <string>
+#include <google/protobuf/compiler/cpp/cpp_options.h>
 #include <google/protobuf/descriptor.h>
 
+
 namespace google {
 namespace protobuf {
   namespace io {
@@ -53,7 +55,7 @@
  public:
   // See generator.cc for the meaning of dllexport_decl.
   explicit EnumGenerator(const EnumDescriptor* descriptor,
-                         const string& dllexport_decl);
+                         const Options& options);
   ~EnumGenerator();
 
   // Header stuff.
@@ -86,7 +88,7 @@
  private:
   const EnumDescriptor* descriptor_;
   string classname_;
-  string dllexport_decl_;
+  Options options_;
 
   GOOGLE_DISALLOW_EVIL_CONSTRUCTORS(EnumGenerator);
 };