Revert 87415 - Convert more interfaces to the new thunk system. This goes up to and including

ppapi/thunk/ppb_file_io_api.h

-// Copyright (c) 2011 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 PPAPI_THUNK_PPB_FILE_IO_API_H_
-#define PPAPI_THUNK_PPB_FILE_IO_API_H_
-
-#include "ppapi/c/dev/ppb_file_io_dev.h"
-
-namespace ppapi {
-namespace thunk {
-
-class PPB_FileIO_API {
- public:
-  virtual int32_t Open(PP_Resource file_ref,
-                       int32_t open_flags,
-                       PP_CompletionCallback callback) = 0;
-  virtual int32_t Query(PP_FileInfo_Dev* info,
-                        PP_CompletionCallback callback) = 0;
-  virtual int32_t Touch(PP_Time last_access_time,
-                        PP_Time last_modified_time,
-                        PP_CompletionCallback callback) = 0;
-  virtual int32_t Read(int64_t offset,
-                       char* buffer,
-                       int32_t bytes_to_read,
-                       PP_CompletionCallback callback) = 0;
-  virtual int32_t Write(int64_t offset,
-                        const char* buffer,
-                        int32_t bytes_to_write,
-                        PP_CompletionCallback callback) = 0;
-  virtual int32_t SetLength(int64_t length,
-                            PP_CompletionCallback callback) = 0;
-  virtual int32_t Flush(PP_CompletionCallback callback) = 0;
-  virtual void Close() = 0;
-
-  // Trusted API.
-  virtual int32_t GetOSFileDescriptor() = 0;
-  virtual int32_t WillWrite(int64_t offset,
-                            int32_t bytes_to_write,
-                            PP_CompletionCallback callback) = 0;
-  virtual int32_t WillSetLength(int64_t length,
-                                PP_CompletionCallback callback) = 0;
-};
-
-}  // namespace thunk
-}  // namespace ppapi
-
-#endif  // PPAPI_THUNK_PPB_FILE_IO_API_H_