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

webrtc/libjingle/xmpp/saslhandler.h

Index: webrtc/libjingle/xmpp/saslhandler.h
diff --git a/webrtc/libjingle/xmpp/saslhandler.h b/webrtc/libjingle/xmpp/saslhandler.h
new file mode 100644
index 0000000000000000000000000000000000000000..f2e3844405bd5b0e9d341583dd6463c60261ac4c
--- /dev/null
+++ b/webrtc/libjingle/xmpp/saslhandler.h
@@ -0,0 +1,42 @@
+/*
+ *  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.
+ */
+
+#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_