Rename pnacl_file_host to nacl_file_host.

chrome/browser/nacl_host/pnacl_file_host.h

-// 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.
-
-#ifndef CHROME_BROWSER_NACL_HOST_PNACL_FILE_HOST_H_
-#define CHROME_BROWSER_NACL_HOST_PNACL_FILE_HOST_H_
-
-#include <string>
-
-class ChromeRenderMessageFilter;
-
-namespace base {
-class FilePath;
-}
-
-namespace IPC {
-class Message;
-}  // namespace IPC
-
-// Opens Pnacl Files in the Browser process, on behalf of the NaCl plugin.
-
-namespace pnacl_file_host {
-
-// Open a Pnacl file (readonly) on behalf of the NaCl plugin.
-void GetReadonlyPnaclFd(ChromeRenderMessageFilter* chrome_render_message_filter,
-                        const std::string& filename,
-                        IPC::Message* reply_msg);
-
-// Return true if the filename requested is valid for opening.
-// Sets file_to_open to the base::FilePath which we will attempt to open.
-bool PnaclCanOpenFile(const std::string& filename,
-                      base::FilePath* file_to_open);
-
-// Creates a temporary file that will be deleted when the last handle
-// is closed, or earlier.
-void CreateTemporaryFile(
-    ChromeRenderMessageFilter* chrome_render_message_filter,
-    IPC::Message* reply_msg);
-
-}  // namespace pnacl_file_host
-
-#endif  // CHROME_BROWSER_NACL_HOST_PNACL_FILE_HOST_H_