PNaCl cleanup: Remove TempFile class and use base::File instead

components/nacl/renderer/plugin/temporary_file.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 COMPONENTS_NACL_RENDERER_PLUGIN_TEMPORARY_FILE_H_
-#define COMPONENTS_NACL_RENDERER_PLUGIN_TEMPORARY_FILE_H_
-
-#include <stdint.h>
-
-#include "base/files/file.h"
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-
-#include "ppapi/c/private/pp_file_handle.h"
-
-namespace plugin {
-
-class Plugin;
-
-// Translation creates two temporary files.  The first temporary file holds
-// the object file created by llc.  The second holds the nexe produced by
-// the linker.  Both of these temporary files are used to both write and
-// read according to the following matrix:
-//
-// PnaclCoordinator::obj_file_:
-//     written by: llc     (passed in explicitly through SRPC)
-//     read by:    ld      (returned via lookup service from SRPC)
-// PnaclCoordinator::nexe_file_:
-//     written by: ld      (passed in explicitly through SRPC)
-//     read by:    sel_ldr (passed in explicitly to command channel)
-//
-
-// TempFile represents a file used as a temporary between stages in
-// translation.  It is automatically deleted when all handles are closed
-// (or earlier -- immediately unlinked on POSIX systems).  The file is only
-// opened, once, but because both reading and writing are necessary (and in
-// different processes), the user should reset / seek back to the beginning
-// of the file between sessions.
-class TempFile {
- public:
-  // Create a TempFile.
-  TempFile(Plugin* plugin, PP_FileHandle handle);
-  ~TempFile();
-
-  bool IsValid() { return file_handle_.IsValid(); }
-  // Resets file position of the handle, for reuse.
-  bool Reset();
-
-  // Returns the current size of this file.
-  int64_t GetLength();
-
-  // Returns a handle to the file, transferring ownership of it.
-  PP_FileHandle TakeFileHandle();
-
-  // Returns a handle to the file, without transferring ownership of it.
-  // This handle remains valid until the TempFile object is destroyed or
-  // TakeFileHandle() is called.
-  PP_FileHandle GetFileHandle();
-
- private:
-  Plugin* plugin_;
-  base::File file_handle_;
-
-  DISALLOW_COPY_AND_ASSIGN(TempFile);
-};
-
-}  // namespace plugin
-
-#endif  // COMPONENTS_NACL_RENDERER_PLUGIN_TEMPORARY_FILE_H_