Move PathExists to base namespace.

base/memory/shared_memory_posix.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 "base/memory/shared_memory.h"
 
 #include <errno.h>
 #include <fcntl.h>
 #include <sys/mman.h>
 #include <sys/stat.h>
@@ skipping 218 matching lines @@
 }
 
 // Our current implementation of shmem is with mmap()ing of files.
 // These files need to be deleted explicitly.
 // In practice this call is only needed for unit tests.
 bool SharedMemory::Delete(const std::string& name) {
   FilePath path;
   if (!FilePathForMemoryName(name, &path))
     return false;
 
-  if (file_util::PathExists(path)) {
+  if (PathExists(path))
     return base::Delete(path, false);
-  }
 
   // Doesn't exist, so success.
   return true;
 }
 
 bool SharedMemory::Open(const std::string& name, bool read_only) {
   FilePath path;
   if (!FilePathForMemoryName(name, &path))
     return false;
 
@@ skipping 163 matching lines @@
   new_handle->fd = new_fd;
   new_handle->auto_close = true;
 
   if (close_self)
     Close();
 
   return true;
 }
 
 }  // namespace base