Convert the async device ID getter to a chrome resource host

ppapi/proxy/flash_device_id_resource.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/proxy/flash_device_id_resource.h"
+
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/proxy/dispatch_reply_message.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/shared_impl/var.h"
+
+namespace ppapi {
+namespace proxy {
+
+FlashDeviceIDResource::FlashDeviceIDResource(Connection connection,
+                                             PP_Instance instance)
+    : PluginResource(connection, instance),
+      dest_(NULL) {
+  SendCreateToBrowser(PpapiHostMsg_FlashDeviceID_Create());
+}
+
+FlashDeviceIDResource::~FlashDeviceIDResource() {
+}
+
+thunk::PPB_Flash_DeviceID_API*
+FlashDeviceIDResource::AsPPB_Flash_DeviceID_API() {
+  return this;
+}
+
+int32_t FlashDeviceIDResource::GetDeviceID(
+    PP_Var* id,
+    scoped_refptr<TrackedCallback> callback) {
+  if (TrackedCallback::IsPending(callback_))
+    return PP_ERROR_INPROGRESS;
+  if (!id)
+    return PP_ERROR_BADARGUMENT;
+
+  dest_ = id;
+  callback_ = callback;
+
+  CallBrowser(PpapiHostMsg_FlashDeviceID_GetDeviceID());
+  return PP_OK_COMPLETIONPENDING;
+}
+
+void FlashDeviceIDResource::OnReplyReceived(
+    const ResourceMessageReplyParams& params,
+    const IPC::Message& msg) {
+  IPC_BEGIN_MESSAGE_MAP(FlashDeviceIDResource, msg)
+    PPAPI_DISPATCH_RESOURCE_REPLY(
+        PpapiPluginMsg_FlashDeviceID_GetDeviceIDReply,
+        OnPluginMsgGetDeviceIDReply)
+  IPC_END_MESSAGE_MAP()
+}
+
+void FlashDeviceIDResource::OnPluginMsgGetDeviceIDReply(
+    const ResourceMessageReplyParams& params,
+    const std::string& id) {
+  if (params.result() == PP_OK)
+    *dest_ = StringVar::StringToPPVar(id);
+  else
+    *dest_ = PP_MakeUndefined();
+  dest_ = NULL;
+  TrackedCallback::ClearAndRun(&callback_, params.result());
+}
+
+}  // namespace proxy
+}  // namespace ppapi