Add an asynchronous version of the Flash DeviceID API.

ppapi/cpp/private/flash_device_id.cc

+// Copyright (c) 2012 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/cpp/private/flash_device_id.h"
+
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/private/ppb_flash_device_id.h"
+#include "ppapi/cpp/module_impl.h"
+
+namespace pp {
+
+namespace {
+
+template <> const char* interface_name<PPB_Flash_DeviceID_1_0>() {
+  return PPB_FLASH_DEVICEID_INTERFACE_1_0;
+}
+
+}  // namespace
+
+namespace flash {
+
+DeviceID::DeviceID() {
+}
+
+DeviceID::DeviceID(const InstanceHandle& instance) : Resource() {
+  if (has_interface<PPB_Flash_DeviceID_1_0>()) {
+    PassRefFromConstructor(get_interface<PPB_Flash_DeviceID_1_0>()->Create(
+        instance.pp_instance()));
+  }
+}
+
+int32_t DeviceID::GetDeviceID(
+    const CompletionCallbackWithOutput<Var>& callback) {
+  if (has_interface<PPB_Flash_DeviceID_1_0>()) {
+    return get_interface<PPB_Flash_DeviceID_1_0>()->GetDeviceID(
+        pp_resource(),
+        callback.output(),
+        callback.pp_completion_callback());
+  }
+  return callback.MayForce(PP_ERROR_NOINTERFACE);
+}
+
+}  // namespace flash
+}  // namespace pp