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

webrtc/libjingle/xmpp/saslmechanism.cc

+/*
+ *  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.
+ */
+
+#include "webrtc/libjingle/xmllite/xmlelement.h"
+#include "webrtc/libjingle/xmpp/constants.h"
+#include "webrtc/libjingle/xmpp/saslmechanism.h"
+#include "webrtc/base/base64.h"
+
+using rtc::Base64;
+
+namespace buzz {
+
+XmlElement *
+SaslMechanism::StartSaslAuth() {
+  return new XmlElement(QN_SASL_AUTH, true);
+}
+
+XmlElement *
+SaslMechanism::HandleSaslChallenge(const XmlElement * challenge) {
+  return new XmlElement(QN_SASL_ABORT, true);
+}
+
+void
+SaslMechanism::HandleSaslSuccess(const XmlElement * success) {
+}
+
+void
+SaslMechanism::HandleSaslFailure(const XmlElement * failure) {
+}
+
+std::string
+SaslMechanism::Base64Encode(const std::string & plain) {
+  return Base64::Encode(plain);
+}
+
+std::string
+SaslMechanism::Base64Decode(const std::string & encoded) {
+  return Base64::Decode(encoded, Base64::DO_LAX);
+}
+
+std::string
+SaslMechanism::Base64EncodeFromArray(const char * plain, size_t length) {
+  std::string result;
+  Base64::EncodeFromArray(plain, length, &result);
+  return result;
+}
+
+}