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

ppapi/thunk/ppb_file_io_trusted_thunk.cc

-// 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.
-
-#include "ppapi/c/dev/ppb_file_io_trusted_dev.h"
-#include "ppapi/c/pp_completion_callback.h"
-#include "ppapi/c/pp_errors.h"
-#include "ppapi/thunk/thunk.h"
-#include "ppapi/thunk/enter.h"
-#include "ppapi/thunk/ppb_file_io_api.h"
-#include "ppapi/thunk/resource_creation_api.h"
-
-namespace ppapi {
-namespace thunk {
-
-namespace {
-
-int32_t GetOSFileDescriptor(PP_Resource file_io) {
-  EnterResource<PPB_FileIO_API> enter(file_io, true);
-  if (enter.failed())
-    return PP_ERROR_BADRESOURCE;
-  return enter.object()->GetOSFileDescriptor();
-}
-
-int32_t WillWrite(PP_Resource file_io,
-                  int64_t offset,
-                  int32_t bytes_to_write,
-                  PP_CompletionCallback callback) {
-  EnterResource<PPB_FileIO_API> enter(file_io, true);
-  if (enter.failed())
-    return PP_ERROR_BADRESOURCE;
-  return enter.object()->WillWrite(offset, bytes_to_write, callback);
-}
-
-int32_t WillSetLength(PP_Resource file_io,
-                      int64_t length,
-                      PP_CompletionCallback callback) {
-  EnterResource<PPB_FileIO_API> enter(file_io, true);
-  if (enter.failed())
-    return PP_ERROR_BADRESOURCE;
-  return enter.object()->WillSetLength(length, callback);
-}
-
-const PPB_FileIOTrusted_Dev g_ppb_file_io_trusted_thunk = {
-  &GetOSFileDescriptor,
-  &WillWrite,
-  &WillSetLength
-};
-
-}  // namespace
-
-const PPB_FileIOTrusted_Dev* GetPPB_FileIOTrusted_Thunk() {
-  return &g_ppb_file_io_trusted_thunk;
-}
-
-}  // namespace thunk
-}  // namespace ppapi