Update //third_party/protobuf to version 3.

third_party/protobuf/src/google/protobuf/generated_enum_reflection.h

 // Protocol Buffers - Google's data interchange format
 // Copyright 2008 Google Inc.  All rights reserved.
-// http://code.google.com/p/protobuf/
+// 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.
 //     * Redistributions in binary form must reproduce the above
 // copyright notice, this list of conditions and the following disclaimer
 // in the documentation and/or other materials provided with the
@@ skipping 20 matching lines @@
 // from protocol-compiler-generated code, which may reside in other components.
 // It provides reflection support for generated enums, and is included in
 // generated .pb.h files and should have minimal dependencies. The methods are
 // implemented in generated_message_reflection.cc.
 
 #ifndef GOOGLE_PROTOBUF_GENERATED_ENUM_REFLECTION_H__
 #define GOOGLE_PROTOBUF_GENERATED_ENUM_REFLECTION_H__
 
 #include <string>
 
+#include <google/protobuf/stubs/template_util.h>
+#include <google/protobuf/generated_enum_util.h>
+
 namespace google {
 namespace protobuf {
   class EnumDescriptor;
 }  // namespace protobuf
 
 namespace protobuf {
 
 // Returns the EnumDescriptor for enum type E, which must be a
 // proto-declared enum type.  Code generated by the protocol compiler
 // will include specializations of this template for each enum type declared.
@@ skipping 22 matching lines @@
 // Just a wrapper around printing the name of a value. The main point of this
 // function is not to be inlined, so that you can do this without including
 // descriptor.h.
 LIBPROTOBUF_EXPORT const string& NameOfEnum(const EnumDescriptor* descriptor, int value);
 
 }  // namespace internal
 }  // namespace protobuf
 
 }  // namespace google
 #endif  // GOOGLE_PROTOBUF_GENERATED_ENUM_REFLECTION_H__