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

webrtc/libjingle/xmpp/iqtask.h

Index: webrtc/libjingle/xmpp/iqtask.h
diff --git a/webrtc/libjingle/xmpp/iqtask.h b/webrtc/libjingle/xmpp/iqtask.h
new file mode 100644
index 0000000000000000000000000000000000000000..0db00711e8623cc65d3c52d6d6af3afa983ccdc2
--- /dev/null
+++ b/webrtc/libjingle/xmpp/iqtask.h
@@ -0,0 +1,49 @@
+/*
+ *  Copyright 2011 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_IQTASK_H_
+#define WEBRTC_LIBJINGLE_XMPP_IQTASK_H_
+
+#include <memory>
+#include <string>
+
+#include "webrtc/libjingle/xmpp/xmppengine.h"
+#include "webrtc/libjingle/xmpp/xmpptask.h"
+
+namespace buzz {
+
+class IqTask : public XmppTask {
+ public:
+  IqTask(XmppTaskParentInterface* parent,
+         const std::string& verb, const Jid& to,
+         XmlElement* el);
+  virtual ~IqTask() {}
+
+  const XmlElement* stanza() const { return stanza_.get(); }
+
+  sigslot::signal2<IqTask*,
+                   const XmlElement*> SignalError;
+
+ protected:
+  virtual void HandleResult(const XmlElement* element) = 0;
+
+ private:
+  virtual int ProcessStart();
+  virtual bool HandleStanza(const XmlElement* stanza);
+  virtual int ProcessResponse();
+  virtual int OnTimeout();
+
+  Jid to_;
+  std::unique_ptr<XmlElement> stanza_;
+};
+
+}  // namespace buzz
+
+#endif  // WEBRTC_LIBJINGLE_XMPP_IQTASK_H_