Revert of Remove webrtc/libjingle/{xmllite,xmpp}

webrtc/libjingle/xmpp/mucroomuniquehangoutidtask.h

Index: webrtc/libjingle/xmpp/mucroomuniquehangoutidtask.h
diff --git a/webrtc/libjingle/xmpp/mucroomuniquehangoutidtask.h b/webrtc/libjingle/xmpp/mucroomuniquehangoutidtask.h
new file mode 100644
index 0000000000000000000000000000000000000000..ac662503f107ca657d04749f3aeaeb139b4f3b20
--- /dev/null
+++ b/webrtc/libjingle/xmpp/mucroomuniquehangoutidtask.h
@@ -0,0 +1,38 @@
+/*
+ *  Copyright 2012 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_LIBJINGLE_XMPP_MUCROOMUNIQUEHANGOUTIDTASK_H_
+#define WEBRTC_LIBJINGLE_XMPP_MUCROOMUNIQUEHANGOUTIDTASK_H_
+
+#include "webrtc/libjingle/xmpp/iqtask.h"
+
+namespace buzz {
+
+// Task to request a unique hangout id to be used when starting a hangout.
+// The protocol is described in https://docs.google.com/a/google.com/
+// document/d/1EFLT6rCYPDVdqQXSQliXwqB3iUkpZJ9B_MNFeOZgN7g/edit
+class MucRoomUniqueHangoutIdTask : public buzz::IqTask {
+ public:
+  MucRoomUniqueHangoutIdTask(buzz::XmppTaskParentInterface* parent,
+                        const Jid& lookup_server_jid);
+  // signal(task, hangout_id)
+  sigslot::signal2<MucRoomUniqueHangoutIdTask*, const std::string&> SignalResult;
+
+ protected:
+  virtual void HandleResult(const buzz::XmlElement* stanza);
+
+ private:
+  static buzz::XmlElement* MakeUniqueRequestXml();
+
+};
+
+} // namespace buzz
+
+#endif  // WEBRTC_LIBJINGLE_XMPP_MUCROOMUNIQUEHANGOUTIDTASK_H_