Move file_util to base/files/ directory.

base/file_util_mac.mm

-// 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 "base/file_util.h"
-
-#import <Foundation/Foundation.h>
-#include <copyfile.h>
-
-#include "base/basictypes.h"
-#include "base/files/file_path.h"
-#include "base/mac/foundation_util.h"
-#include "base/strings/string_util.h"
-#include "base/threading/thread_restrictions.h"
-
-namespace base {
-namespace internal {
-
-bool CopyFileUnsafe(const FilePath& from_path, const FilePath& to_path) {
-  ThreadRestrictions::AssertIOAllowed();
-  return (copyfile(from_path.value().c_str(),
-                   to_path.value().c_str(), NULL, COPYFILE_DATA) == 0);
-}
-
-}  // namespace internal
-
-bool GetTempDir(base::FilePath* path) {
-  NSString* tmp = NSTemporaryDirectory();
-  if (tmp == nil)
-    return false;
-  *path = base::mac::NSStringToFilePath(tmp);
-  return true;
-}
-
-FilePath GetHomeDir() {
-  NSString* tmp = NSHomeDirectory();
-  if (tmp != nil) {
-    FilePath mac_home_dir = base::mac::NSStringToFilePath(tmp);
-    if (!mac_home_dir.empty())
-      return mac_home_dir;
-  }
-
-  // Fall back on temp dir if no home directory is defined.
-  FilePath rv;
-  if (GetTempDir(&rv))
-    return rv;
-
-  // Last resort.
-  return FilePath("/tmp");
-}
-
-}  // namespace base