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

webrtc/libjingle/xmpp/discoitemsquerytask.h

+/*
+ *  Copyright 2004 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.
+ */
+
+// Fires a disco items query, such as the following example:
+//
+//      <iq type='get'
+//          from='foo@gmail.com/asdf'
+//          to='bar@google.com'
+//          id='1234'>
+//          <query xmlns=' http://jabber.org/protocol/disco#items'
+//                 node='blah '/>
+//      </iq>
+//
+// Sample response:
+//
+//      <iq type='result'
+//          from=' hendriks@google.com'
+//          to='rsturgell@google.com/asdf'
+//          id='1234'>
+//          <query xmlns=' http://jabber.org/protocol/disco#items '
+//                 node='blah'>
+//                 <item something='somethingelse'/>
+//          </query>
+//      </iq>
+
+
+#ifndef WEBRTC_LIBJINGLE_XMPP_DISCOITEMSQUERYTASK_H_
+#define WEBRTC_LIBJINGLE_XMPP_DISCOITEMSQUERYTASK_H_
+
+#include <string>
+#include <vector>
+
+#include "webrtc/libjingle/xmpp/iqtask.h"
+
+namespace buzz {
+
+struct DiscoItem {
+  std::string jid;
+  std::string node;
+  std::string name;
+};
+
+class DiscoItemsQueryTask : public IqTask {
+ public:
+  DiscoItemsQueryTask(XmppTaskParentInterface* parent,
+                      const Jid& to, const std::string& node);
+
+  sigslot::signal1<std::vector<DiscoItem> > SignalResult;
+
+ private:
+  static XmlElement* MakeRequest(const std::string& node);
+  virtual void HandleResult(const XmlElement* result);
+  static bool ParseItem(const XmlElement* element, DiscoItem* item);
+};
+
+}  // namespace buzz
+
+#endif  // WEBRTC_LIBJINGLE_XMPP_DISCOITEMSQUERYTASK_H_