Pull seccomp-sandbox in via DEPS rather than using an in-tree copy...

sandbox/linux/seccomp/gettid.cc

Index: sandbox/linux/seccomp/gettid.cc
===================================================================
--- sandbox/linux/seccomp/gettid.cc	(revision 57969)
+++ sandbox/linux/seccomp/gettid.cc	(working copy)
@@ -1,18 +0,0 @@
-// 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.
-
-#include "debug.h"
-#include "sandbox_impl.h"
-
-namespace playground {
-
-long Sandbox::sandbox_gettid() {
-  long long tm;
-  Debug::syscall(&tm, __NR_gettid, "Executing handler");
-  pid_t t = tid();
-  Debug::elapsed(tm, __NR_gettid);
-  return t;
-}
-
-} // namespace