Refactor FileSystem

ppapi/proxy/file_system_resource.cc

+// Copyright (c) 2013 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/proxy/file_system_resource.h"
+
+#include "base/bind.h"
+#include "ipc/ipc_message.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/shared_impl/tracked_callback.h"
+
+using ppapi::thunk::PPB_FileSystem_API;
+
+namespace ppapi {
+namespace proxy {
+
+FileSystemResource::FileSystemResource(Connection connection,
+                                       PP_Instance instance,
+                                       PP_FileSystemType type)
+    : PluginResource(connection, instance),
+      type_(type),
+      called_open_(false) {
+  DCHECK(type_ != PP_FILESYSTEMTYPE_INVALID);
+  SendCreate(RENDERER, PpapiHostMsg_FileSystem_Create(type_));
+}
+
+FileSystemResource::~FileSystemResource() {
+}
+
+PPB_FileSystem_API* FileSystemResource::AsPPB_FileSystem_API() {
+  return this;
+}
+
+int32_t FileSystemResource::Open(int64_t expected_size,
+                                 scoped_refptr<TrackedCallback> callback) {
+  if (called_open_)
+    return PP_ERROR_FAILED;
+  called_open_ = true;
+
+  Call<PpapiPluginMsg_FileSystem_OpenReply>(RENDERER,
+      PpapiHostMsg_FileSystem_Open(expected_size),
+      base::Bind(&FileSystemResource::OpenComplete,
+                 this,
+                 callback));
+  return PP_OK_COMPLETIONPENDING;
+}
+
+PP_FileSystemType FileSystemResource::GetType() {
+  return type_;
+}
+
+void FileSystemResource::OpenComplete(
+    scoped_refptr<TrackedCallback> callback,
+    const ResourceMessageReplyParams& params) {
+  callback->Run(params.result());
+}
+
+}  // namespace proxy
+}  // namespace ppapi