Non-SFI NaCl: Allow openat system call to gracefully fail on BareMetal seccomp-bpf.

components/nacl/loader/nonsfi/nonsfi_sandbox_sigsys_unittest.cc

 // Copyright 2014 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.
 
 // Sanitizers internally use some syscalls which non-SFI NaCl disallows.
 #if !defined(ADDRESS_SANITIZER) && !defined(THREAD_SANITIZER) && \
     !defined(MEMORY_SANITIZER) && !defined(LEAK_SANITIZER)
 
 #include "components/nacl/loader/nonsfi/nonsfi_sandbox.h"
 
@@ skipping 301 matching lines @@
 #if defined(__i386__)
 RESTRICT_SYSCALL_DEATH_TEST(oldolduname);
 #endif
 #if defined(__i386__)
 RESTRICT_SYSCALL_DEATH_TEST(oldstat);
 #endif
 #if defined(__i386__)
 RESTRICT_SYSCALL_DEATH_TEST(olduname);
 #endif
 RESTRICT_SYSCALL_DEATH_TEST(open_by_handle_at);
-RESTRICT_SYSCALL_DEATH_TEST(openat);
 RESTRICT_SYSCALL_DEATH_TEST(pause);
 #if defined(__arm__)
 RESTRICT_SYSCALL_DEATH_TEST(pciconfig_iobase);
 #endif
 #if defined(__arm__)
 RESTRICT_SYSCALL_DEATH_TEST(pciconfig_read);
 #endif
 #if defined(__arm__)
 RESTRICT_SYSCALL_DEATH_TEST(pciconfig_write);
 #endif
@@ skipping 275 matching lines @@
 RESTRICT_ARM_SYSCALL_DEATH_TEST(breakpoint);
 RESTRICT_ARM_SYSCALL_DEATH_TEST(usr26);
 RESTRICT_ARM_SYSCALL_DEATH_TEST(usr32);
 RESTRICT_ARM_SYSCALL_DEATH_TEST(set_tls);
 #endif
 
 }  // namespace
 
 #endif  // !ADDRESS_SANITIZER && !THREAD_SANITIZER &&
         // !MEMORY_SANITIZER && !LEAK_SANITIZER