diff -r 000000000000 -r 6474c204b198 security/sandbox/win/src/sid_unittest.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/security/sandbox/win/src/sid_unittest.cc	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,71 @@
+// Copyright (c) 2006-2008 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.
+
+// This file contains unit tests for the sid class.
+
+#define _ATL_NO_EXCEPTIONS
+#include <atlbase.h>
+#include <atlsecurity.h>
+
+#include "sandbox/win/src/sid.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace sandbox {
+
+// Calls ::EqualSid. This function exists only to simplify the calls to
+// ::EqualSid by removing the need to cast the input params.
+BOOL EqualSid(const SID *sid1, const SID *sid2) {
+  return ::EqualSid(const_cast<SID*>(sid1), const_cast<SID*>(sid2));
+}
+
+// Tests the creation if a Sid
+TEST(SidTest, Constructors) {
+  ATL::CSid sid_world = ATL::Sids::World();
+  SID *sid_world_pointer = const_cast<SID*>(sid_world.GetPSID());
+
+  // Check the SID* constructor
+  Sid sid_sid_star(sid_world_pointer);
+  ASSERT_TRUE(EqualSid(sid_world_pointer, sid_sid_star.GetPSID()));
+
+  // Check the copy constructor
+  Sid sid_copy(sid_sid_star);
+  ASSERT_TRUE(EqualSid(sid_world_pointer, sid_copy.GetPSID()));
+
+  // Note that the WELL_KNOWN_SID_TYPE constructor is tested in the GetPSID
+  // test.
+}
+
+// Tests the method GetPSID
+TEST(SidTest, GetPSID) {
+  // Check for non-null result;
+  ASSERT_NE(static_cast<SID*>(NULL), Sid(::WinLocalSid).GetPSID());
+  ASSERT_NE(static_cast<SID*>(NULL), Sid(::WinCreatorOwnerSid).GetPSID());
+  ASSERT_NE(static_cast<SID*>(NULL), Sid(::WinBatchSid).GetPSID());
+
+  ASSERT_TRUE(EqualSid(Sid(::WinNullSid).GetPSID(),
+                       ATL::Sids::Null().GetPSID()));
+
+  ASSERT_TRUE(EqualSid(Sid(::WinWorldSid).GetPSID(),
+                       ATL::Sids::World().GetPSID()));
+
+  ASSERT_TRUE(EqualSid(Sid(::WinDialupSid).GetPSID(),
+                       ATL::Sids::Dialup().GetPSID()));
+
+  ASSERT_TRUE(EqualSid(Sid(::WinNetworkSid).GetPSID(),
+                       ATL::Sids::Network().GetPSID()));
+
+  ASSERT_TRUE(EqualSid(Sid(::WinBuiltinAdministratorsSid).GetPSID(),
+                       ATL::Sids::Admins().GetPSID()));
+
+  ASSERT_TRUE(EqualSid(Sid(::WinBuiltinUsersSid).GetPSID(),
+                       ATL::Sids::Users().GetPSID()));
+
+  ASSERT_TRUE(EqualSid(Sid(::WinBuiltinGuestsSid).GetPSID(),
+                       ATL::Sids::Guests().GetPSID()));
+
+  ASSERT_TRUE(EqualSid(Sid(::WinProxySid).GetPSID(),
+                       ATL::Sids::Proxy().GetPSID()));
+}
+
+}  // namespace sandbox