diff -r 000000000000 -r 6474c204b198 security/sandbox/chromium/base/guid.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/sandbox/chromium/base/guid.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,32 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_GUID_H_
+#define BASE_GUID_H_
+
+#include <string>
+
+#include "base/base_export.h"
+#include "base/basictypes.h"
+#include "build/build_config.h"
+
+namespace base {
+
+// Generate a 128-bit random GUID of the form: "%08X-%04X-%04X-%04X-%012llX".
+// If GUID generation fails an empty string is returned.
+// The POSIX implementation uses psuedo random number generation to create
+// the GUID.  The Windows implementation uses system services.
+BASE_EXPORT std::string GenerateGUID();
+
+// Returns true if the input string conforms to the GUID format.
+BASE_EXPORT bool IsValidGUID(const std::string& guid);
+
+#if defined(OS_POSIX)
+// For unit testing purposes only.  Do not use outside of tests.
+BASE_EXPORT std::string RandomDataToGUIDString(const uint64 bytes[2]);
+#endif
+
+}  // namespace guid
+
+#endif  // BASE_GUID_H_