Revert of Small refactor around futex.h.

sandbox/linux/system_headers/linux_futex.h

Index: sandbox/linux/system_headers/linux_futex.h
diff --git a/sandbox/linux/system_headers/linux_futex.h b/sandbox/linux/system_headers/linux_futex.h
deleted file mode 100644
index 91733a8d2f96c08325e16b3fa4411b2d680f46e7..0000000000000000000000000000000000000000
--- a/sandbox/linux/system_headers/linux_futex.h
+++ /dev/null
@@ -1,82 +0,0 @@
-// 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.
-
-#ifndef SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_FUTEX_H_
-#define SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_FUTEX_H_
-
-#include <linux/futex.h>
-
-#if !defined(FUTEX_WAIT)
-#define FUTEX_WAIT 0
-#endif
-
-#if !defined(FUTEX_WAKE)
-#define FUTEX_WAKE 1
-#endif
-
-#if !defined(FUTEX_FD)
-#define FUTEX_FD 2
-#endif
-
-#if !defined(FUTEX_REQUEUE)
-#define FUTEX_REQUEUE 3
-#endif
-
-#if !defined(FUTEX_CMP_REQUEUE)
-#define FUTEX_CMP_REQUEUE 4
-#endif
-
-#if !defined(FUTEX_WAKE_OP)
-#define FUTEX_WAKE_OP 5
-#endif
-
-#if !defined(FUTEX_LOCK_PI)
-#define FUTEX_LOCK_PI 6
-#endif
-
-#if !defined(FUTEX_UNLOCK_PI)
-#define FUTEX_UNLOCK_PI 7
-#endif
-
-#if !defined(FUTEX_TRYLOCK_PI)
-#define FUTEX_TRYLOCK_PI 8
-#endif
-
-#if !defined(FUTEX_WAIT_BITSET)
-#define FUTEX_WAIT_BITSET 9
-#endif
-
-#if !defined(FUTEX_WAKE_BITSET)
-#define FUTEX_WAKE_BITSET 10
-#endif
-
-#if !defined(FUTEX_WAIT_REQUEUE_PI)
-#define FUTEX_WAIT_REQUEUE_PI 11
-#endif
-
-#if !defined(FUTEX_CMP_REQUEUE_PI)
-#define FUTEX_CMP_REQUEUE_PI 12
-#endif
-
-#if !defined(FUTEX_PRIVATE_FLAG)
-#define FUTEX_PRIVATE_FLAG 128
-#endif
-
-#if !defined FUTEX_CLOCK_REALTIME
-#define FUTEX_CLOCK_REALTIME 256
-#endif
-
-#if !defined(FUTEX_CMD_MASK)
-#define FUTEX_CMD_MASK ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)
-#endif
-
-#if !defined(FUTEX_CMP_REQUEUE_PI_PRIVATE)
-#define FUTEX_CMP_REQUEUE_PI_PRIVATE (FUTEX_CMP_REQUEUE_PI | FUTEX_PRIVATE_FLAG)
-#endif
-
-#if !defined(FUTEX_UNLOCK_PI_PRIVATE)
-#define FUTEX_UNLOCK_PI_PRIVATE (FUTEX_UNLOCK_PI | FUTEX_PRIVATE_FLAG)
-#endif
-
-#endif  // SANDBOX_LINUX_SYSTEM_HEADERS_LINUX_FUTEX_H_