Update //third_party/protobuf to version 3.

third_party/protobuf/src/google/protobuf/testing/zcgunzip.cc

Index: third_party/protobuf/src/google/protobuf/testing/zcgunzip.cc
diff --git a/third_party/protobuf/src/google/protobuf/testing/zcgunzip.cc b/third_party/protobuf/src/google/protobuf/testing/zcgunzip.cc
index a6197854bdef63dc11bbdf0b3cf1f7884348b0e3..76f8cfe11b2b3937a5c73a443b504dc34ad74fe4 100644
--- a/third_party/protobuf/src/google/protobuf/testing/zcgunzip.cc
+++ b/third_party/protobuf/src/google/protobuf/testing/zcgunzip.cc
@@ -1,6 +1,6 @@
 // Protocol Buffers - Google's data interchange format
 // Copyright 2009 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
@@ -38,13 +38,20 @@
 // Reads gzip stream on standard input and writes decompressed data to standard
 // output.
 
-#include "config.h"
-
 #include <assert.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <fcntl.h>
 
+#ifdef _WIN32
+#ifndef STDIN_FILENO
+#define STDIN_FILENO 0
+#endif
+#ifndef STDOUT_FILENO
+#define STDOUT_FILENO 1
+#endif
+#endif
+
 #include <google/protobuf/io/gzip_stream.h>
 #include <google/protobuf/io/zero_copy_stream_impl.h>