Add xmllite and xmpp sources to third_party/

third_party/libjingle_xmpp/xmpp/saslhandler.h

+// Copyright 2004 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.
+
+#ifndef WEBRTC_LIBJINGLE_XMPP_SASLHANDLER_H_
+#define WEBRTC_LIBJINGLE_XMPP_SASLHANDLER_H_
+
+#include <string>
+#include <vector>
+
+namespace buzz {
+
+class XmlElement;
+class SaslMechanism;
+
+// Creates mechanisms to deal with a given mechanism
+class SaslHandler {
+
+public:
+
+  // Intended to be subclassed
+  virtual ~SaslHandler() {}
+
+  // Should pick the best method according to this handler
+  // returns the empty string if none are suitable
+  virtual std::string ChooseBestSaslMechanism(const std::vector<std::string> & mechanisms, bool encrypted) = 0;
+
+  // Creates a SaslMechanism for the given mechanism name (you own it
+  // once you get it).
+  // If not handled, return NULL.
+  virtual SaslMechanism * CreateSaslMechanism(const std::string & mechanism) = 0;
+};
+
+}
+
+#endif  // WEBRTC_LIBJINGLE_XMPP_SASLHANDLER_H_