Fixing remaining VC++ 2015 64-bit build breaks

sandbox/win/src/handle_inheritance_test.cc

 // 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.
 
 #include <stdio.h>
 
 #include "base/files/file_util.h"
 #include "base/files/scoped_temp_dir.h"
 #include "base/memory/shared_memory.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/win/scoped_handle.h"
+#include "base/win/win_util.h"
 #include "base/win/windows_version.h"
 #include "sandbox/win/tests/common/controller.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace sandbox {
 
 SBOX_TESTS_COMMAND int HandleInheritanceTests_PrintToStdout(int argc,
                                                             wchar_t** argv) {
   printf("Example output to stdout\n");
   return SBOX_TEST_SUCCEEDED;
@@ skipping 54 matching lines @@
   base::SharedMemory test_shared_memory;
   ASSERT_TRUE(test_shared_memory.CreateAnonymous(1000));
   ASSERT_TRUE(test_shared_memory.Map(0));
 
   TestRunner runner;
   void* shared_handle = runner.GetPolicy()->AddHandleToShare(
       test_shared_memory.handle().GetHandle());
 
   std::string command_line =
       "HandleInheritanceTests_ValidInheritedHandle " +
-      base::UintToString(reinterpret_cast<unsigned int>(shared_handle));
+      base::UintToString(base::win::HandleToUint32(shared_handle));
   int result = runner.RunTest(base::UTF8ToUTF16(command_line).c_str());
   ASSERT_EQ(SBOX_TEST_SUCCEEDED, result);
 }
 
 }  // namespace sandbox