diff -r 000000000000 -r 6474c204b198 dom/plugins/ipc/hangui/PluginHangUI.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/plugins/ipc/hangui/PluginHangUI.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,54 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef mozilla_plugins_PluginHangUI_h
+#define mozilla_plugins_PluginHangUI_h
+
+namespace mozilla {
+namespace plugins {
+
+enum HangUIUserResponse
+{
+  HANGUI_USER_RESPONSE_CANCEL = 1,
+  HANGUI_USER_RESPONSE_CONTINUE = 2,
+  HANGUI_USER_RESPONSE_STOP = 4,
+  HANGUI_USER_RESPONSE_DONT_SHOW_AGAIN = 8
+};
+
+enum PluginHangUIStructID
+{
+  PLUGIN_HANGUI_COMMAND = 0x10,
+  PLUGIN_HANGUI_RESULT
+};
+
+struct PluginHangUICommand
+{
+  enum
+  {
+    identifier = PLUGIN_HANGUI_COMMAND
+  };
+  enum CmdCode
+  {
+    HANGUI_CMD_SHOW = 1,
+    HANGUI_CMD_CANCEL = 2
+  };
+  CmdCode mCode;
+};
+
+struct PluginHangUIResponse
+{
+  enum
+  {
+    identifier = PLUGIN_HANGUI_RESULT
+  };
+  unsigned int  mResponseBits;
+};
+
+} // namespace plugins
+} // namespace mozilla
+
+#endif // mozilla_plugins_PluginHangUI_h
+