Convert more interfaces to the new thunk system.

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