Move PathIsWritable, DirectoryExists, ContentsEqual, and TextContentsEqual to the base namespace.

remoting/host/setup/daemon_controller_linux.cc

 // 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 "remoting/host/setup/daemon_controller.h"
 
 #include <unistd.h>
 
 #include "base/basictypes.h"
 #include "base/bind.h"
@@ skipping 237 matching lines @@
           args, base::TimeDelta::FromSeconds(kSudoTimeoutSeconds),
           &exit_code) ||
       exit_code != 0) {
     LOG(ERROR) << "Failed to add user to chrome-remote-desktop group.";
     done_callback.Run(RESULT_FAILED);
     return;
   }
 
   // Ensure the configuration directory exists.
   base::FilePath config_dir = GetConfigPath().DirName();
-  if (!file_util::DirectoryExists(config_dir) &&
+  if (!base::DirectoryExists(config_dir) &&
       !file_util::CreateDirectory(config_dir)) {
     LOG(ERROR) << "Failed to create config directory " << config_dir.value();
     done_callback.Run(RESULT_FAILED);
     return;
   }
 
   // Write config.
   JsonHostConfig config_file(GetConfigPath());
   if (!config_file.CopyFrom(config.get()) ||
       !config_file.Save()) {
@@ skipping 83 matching lines @@
   done_callback.Run(version);
 }
 
 }  // namespace
 
 scoped_ptr<DaemonController> remoting::DaemonController::Create() {
   return scoped_ptr<DaemonController>(new DaemonControllerLinux());
 }
 
 }  // namespace remoting