Revert of Remove the rtc_relative_path GYP variable and similar defines

webrtc/libjingle/xmpp/xmppstanzaparser.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/xmpp/xmppstanzaparser.h"
 
 #include "webrtc/libjingle/xmllite/xmlelement.h"
 #include "webrtc/libjingle/xmpp/constants.h"
 #include "webrtc/base/common.h"
+#ifdef EXPAT_RELATIVE_PATH
 #include "expat.h"
+#else
+#include "third_party/expat/v2_0_1/Source/lib/expat.h"
+#endif
 
 namespace buzz {
 
 XmppStanzaParser::XmppStanzaParser(XmppStanzaParseHandler *psph) :
   psph_(psph),
   innerHandler_(this),
   parser_(&innerHandler_),
   depth_(0),
   builder_() {
 }
@@ skipping 49 matching lines @@
 
 void
 XmppStanzaParser::IncomingError(
     XmlParseContext * pctx, XML_Error errCode) {
   RTC_UNUSED(pctx);
   RTC_UNUSED(errCode);
   psph_->XmlError();
 }
 
 }