Revert of Remove the rtc_relative_path GYP variable and similar defines

webrtc/libjingle/xmllite/xmlbuilder.h

 /*
  *  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 _xmlbuilder_h_
 #define _xmlbuilder_h_
 
 #include <string>
 #include <vector>
 #include "webrtc/libjingle/xmllite/xmlparser.h"
 #include "webrtc/base/scoped_ptr.h"
 
+#ifdef EXPAT_RELATIVE_PATH
 #include "expat.h"
+#else
+#include "third_party/expat/v2_0_1/Source/lib/expat.h"
+#endif  // EXPAT_RELATIVE_PATH
 
 namespace buzz {
 
 class XmlElement;
 class XmlParseContext;
 
 
 class XmlBuilder : public XmlParseHandler {
 public:
   XmlBuilder();
@@ skipping 18 matching lines @@
 
 private:
   XmlElement * pelCurrent_;
   rtc::scoped_ptr<XmlElement> pelRoot_;
   rtc::scoped_ptr<std::vector<XmlElement*> > pvParents_;
 };
 
 }
 
 #endif