Moving GUID generation from base to chrome/browser/guid*

chrome/browser/guid.h

+// Copyright (c) 2010 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 CHROME_BROWSER_GUID_H_
+#define CHROME_BROWSER_GUID_H_
+#pragma once
+
+#include <string>
+
+#include "base/basictypes.h"
+#include "build/build_config.h"
+
+namespace guid {
+
+// 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.
+std::string GenerateGUID();
+
+#if defined(OS_POSIX)
+// For unit testing purposes only.  Do not use outside of tests.
+std::string RandomDataToGUIDString(const uint64 bytes[2]);
+#endif
+
+}  // namespace guid
+
+#endif  // CHROME_BROWSER_GUID_H_