Add xmllite and xmpp sources to third_party/

third_party/xmllite/xmlprinter.h

Index: third_party/xmllite/xmlprinter.h
diff --git a/third_party/xmllite/xmlprinter.h b/third_party/xmllite/xmlprinter.h
new file mode 100644
index 0000000000000000000000000000000000000000..8cd73246922a19faafb23f66a3f017a308b72f65
--- /dev/null
+++ b/third_party/xmllite/xmlprinter.h
@@ -0,0 +1,26 @@
+// 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_XMLLITE_XMLPRINTER_H_
+#define WEBRTC_LIBJINGLE_XMLLITE_XMLPRINTER_H_
+
+#include <iosfwd>
+#include <string>
+
+namespace buzz {
+
+class XmlElement;
+class XmlnsStack;
+
+class XmlPrinter {
+ public:
+  static void PrintXml(std::ostream* pout, const XmlElement* pelt);
+
+  static void PrintXml(std::ostream* pout, const XmlElement* pelt,
+                       XmlnsStack* ns_stack);
+};
+
+}  // namespace buzz
+
+#endif  // WEBRTC_LIBJINGLE_XMLLITE_XMLPRINTER_H_