Update //third_party/protobuf to version 3.

third_party/protobuf/src/google/protobuf/generated_message_util.h

Index: third_party/protobuf/src/google/protobuf/generated_message_util.h
diff --git a/third_party/protobuf/src/google/protobuf/generated_message_util.h b/third_party/protobuf/src/google/protobuf/generated_message_util.h
index 6e4669c271a858c3a0028f7e2447cbf6c90889b7..813fb43dfb21d39d02c819e7646e7a5f2b5442b9 100644
--- a/third_party/protobuf/src/google/protobuf/generated_message_util.h
+++ b/third_party/protobuf/src/google/protobuf/generated_message_util.h
@@ -1,6 +1,6 @@
 // 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
@@ -38,14 +38,22 @@
 #ifndef GOOGLE_PROTOBUF_GENERATED_MESSAGE_UTIL_H__
 #define GOOGLE_PROTOBUF_GENERATED_MESSAGE_UTIL_H__
 
+#include <assert.h>
 #include <string>
 
-#include <google/protobuf/stubs/common.h>
 #include <google/protobuf/stubs/once.h>
+
+#include <google/protobuf/stubs/common.h>
 namespace google {
+
 namespace protobuf {
+
+class Arena;
+namespace io { class CodedInputStream; }
+
 namespace internal {
 
+
 // Annotation for the compiler to emit a deprecation message if a field marked
 // with option 'deprecated=true' is used in the code, or for other things in
 // generated code which are deprecated.
@@ -60,23 +68,49 @@ namespace internal {
 LIBPROTOBUF_EXPORT double Infinity();
 LIBPROTOBUF_EXPORT double NaN();
 
+// TODO(jieluo): Change to template. We have tried to use template,
+// but it causes net/rpc/python:rpcutil_test fail (the empty string will
+// init twice). It may related to swig. Change to template after we
+// found the solution.
+
 // Default empty string object. Don't use the pointer directly. Instead, call
 // GetEmptyString() to get the reference.
 LIBPROTOBUF_EXPORT extern const ::std::string* empty_string_;
 LIBPROTOBUF_EXPORT extern ProtobufOnceType empty_string_once_init_;
-
 LIBPROTOBUF_EXPORT void InitEmptyString();
 
+
+LIBPROTOBUF_EXPORT inline const ::std::string& GetEmptyStringAlreadyInited() {
+  assert(empty_string_ != NULL);
+  return *empty_string_;
+}
+
 LIBPROTOBUF_EXPORT const ::std::string& GetEmptyString();
 
-// Defined in generated_message_reflection.cc -- not actually part of the lite
-// library.
-//
-// TODO(jasonh): The various callers get this declaration from a variety of
-// places: probably in most cases repeated_field.h. Clean these up so they all
-// get the declaration from this file.
 LIBPROTOBUF_EXPORT int StringSpaceUsedExcludingSelf(const string& str);
 
+
+// True if IsInitialized() is true for all elements of t.  Type is expected
+// to be a RepeatedPtrField<some message type>.  It's useful to have this
+// helper here to keep the protobuf compiler from ever having to emit loops in
+// IsInitialized() methods.  We want the C++ compiler to inline this or not
+// as it sees fit.
+template <class Type> bool AllAreInitialized(const Type& t) {
+  for (int i = t.size(); --i >= 0; ) {
+    if (!t.Get(i).IsInitialized()) return false;
+  }
+  return true;
+}
+
+class ArenaString;
+
+// Read a length (varint32), followed by a string, from *input.  Return a
+// pointer to a copy of the string that resides in *arena.  Requires both
+// args to be non-NULL.  If something goes wrong while reading the data
+// then NULL is returned (e.g., input does not start with a valid varint).
+ArenaString* ReadArenaString(::google::protobuf::io::CodedInputStream* input,
+                             ::google::protobuf::Arena* arena);
+
 }  // namespace internal
 }  // namespace protobuf