Non-SFI mode: Remove old Non-SFI code.

components/nacl/loader/nonsfi/irt_icache.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.
-
-#if defined(__arm__)  // nacl_irt_icache is supported only on ARM.
-
-#include <errno.h>
-#include <sys/syscall.h>
-#include <stddef.h>
-
-#include "components/nacl/loader/nonsfi/irt_interfaces.h"
-
-namespace nacl {
-namespace nonsfi {
-
-namespace {
-
-// TODO(mazda): Revisit the implementation to consider inlining the syscall
-// with assembly when Non-SFI mode's IRT implementations get moved to the
-// NaCl repository.
-int IrtClearCache(void* addr, size_t size) {
-  // The third argument of cacheflush is just ignored for now and should
-  // always be zero.
-  int result = syscall(__ARM_NR_cacheflush,
-                       addr, reinterpret_cast<intptr_t>(addr) + size, 0);
-  if (result < 0)
-    return errno;
-  return 0;
-}
-
-}  // namespace
-
-const nacl_irt_icache kIrtIcache = {
-  IrtClearCache
-};
-
-}  // namespace nonsfi
-}  // namespace nacl
-
-#endif