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

ppapi/thunk/ppb_directory_reader_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_directory_reader_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_directory_reader_api.h"
-#include "ppapi/thunk/resource_creation_api.h"
-
-namespace ppapi {
-namespace thunk {
-
-namespace {
-
-PP_Resource Create(PP_Resource directory_ref) {
-  EnterFunctionGivenResource<ResourceCreationAPI> enter(directory_ref, true);
-  if (enter.failed())
-    return 0;
-  return enter.functions()->CreateDirectoryReader(directory_ref);
-}
-
-PP_Bool IsDirectoryReader(PP_Resource resource) {
-  EnterResource<PPB_DirectoryReader_API> enter(resource, false);
-  return PP_FromBool(enter.succeeded());
-}
-
-int32_t GetNextEntry(PP_Resource directory_reader,
-                     PP_DirectoryEntry_Dev* entry,
-                     PP_CompletionCallback callback) {
-  EnterResource<PPB_DirectoryReader_API> enter(directory_reader, true);
-  if (enter.failed())
-    return PP_ERROR_BADRESOURCE;
-  return enter.object()->GetNextEntry(entry, callback);
-}
-
-const PPB_DirectoryReader_Dev g_ppb_directory_reader_thunk = {
-  &Create,
-  &IsDirectoryReader,
-  &GetNextEntry
-};
-
-}  // namespace
-
-const PPB_DirectoryReader_Dev* GetPPB_DirectoryReader_Thunk() {
-  return &g_ppb_directory_reader_thunk;
-}
-
-}  // namespace thunk
-}  // namespace ppapi