Add an asynchronous version of the Flash DeviceID API.

ppapi/c/private/ppb_flash_device_id.h

+/* 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.
+ */
+
+/* From private/ppb_flash_device_id.idl modified Fri Jun  1 15:21:17 2012. */
+
+#ifndef PPAPI_C_PRIVATE_PPB_FLASH_DEVICE_ID_H_
+#define PPAPI_C_PRIVATE_PPB_FLASH_DEVICE_ID_H_
+
+#include "ppapi/c/pp_bool.h"
+#include "ppapi/c/pp_completion_callback.h"
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/c/pp_macros.h"
+#include "ppapi/c/pp_resource.h"
+#include "ppapi/c/pp_stdint.h"
+#include "ppapi/c/pp_var.h"
+
+#define PPB_FLASH_DEVICEID_INTERFACE_1_0 "PPB_Flash_DeviceID;1.0"
+#define PPB_FLASH_DEVICEID_INTERFACE PPB_FLASH_DEVICEID_INTERFACE_1_0
+
+/**
+ * @file
+ * This file contains the <code>PPB_Flash_DeviceID</code> interface.
+ */
+
+
+/**
+ * @addtogroup Interfaces
+ * @{
+ */
+struct PPB_Flash_DeviceID_1_0 {
+  PP_Resource (*Create)(PP_Instance instance);
+  /**
+   * Asynchronously computes the device ID. When available, it will place the
+   * string in |*id| and will call the completion callback. On failure the
+   * given var will be PP_VARTYPE_UNDEFINED.
+   */
+  int32_t (*GetDeviceID)(PP_Resource device_id,
+                         struct PP_Var* id,
+                         struct PP_CompletionCallback callback);
+};
+
+typedef struct PPB_Flash_DeviceID_1_0 PPB_Flash_DeviceID;
+/**
+ * @}
+ */
+
+#endif  /* PPAPI_C_PRIVATE_PPB_FLASH_DEVICE_ID_H_ */
+