Revert of Remove the rtc_relative_path GYP variable and similar defines

webrtc/pc/srtpfilter.cc

 /*
  *  Copyright 2009 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/pc/srtpfilter.h"
 
 #include <string.h>
 
 #include <algorithm>
 
 #include "webrtc/base/base64.h"
 #include "webrtc/base/byteorder.h"
 #include "webrtc/base/common.h"
 #include "webrtc/base/logging.h"
 #include "webrtc/base/stringencode.h"
 #include "webrtc/base/timeutils.h"
 #include "webrtc/media/base/rtputils.h"
 
 // Enable this line to turn on SRTP debugging
 // #define SRTP_DEBUG
 
 #ifdef HAVE_SRTP
 extern "C" {
+#ifdef SRTP_RELATIVE_PATH
+#include "srtp.h"  // NOLINT
+#include "srtp_priv.h"  // NOLINT
+#else
 #include "third_party/libsrtp/srtp/include/srtp.h"
 #include "third_party/libsrtp/srtp/include/srtp_priv.h"
+#endif  // SRTP_RELATIVE_PATH
 }
 #ifdef  ENABLE_EXTERNAL_AUTH
 #include "webrtc/pc/externalhmac.h"
 #endif  // ENABLE_EXTERNAL_AUTH
 #if !defined(NDEBUG)
 extern "C" debug_module_t mod_srtp;
 extern "C" debug_module_t mod_auth;
 extern "C" debug_module_t mod_cipher;
 extern "C" debug_module_t mod_stat;
 extern "C" debug_module_t mod_alloc;
@@ skipping 879 matching lines @@
   SrtpNotAvailable(__FUNCTION__);
 }
 
 void SrtpStat::HandleSrtpResult(const SrtpStat::FailureKey& key) {
   SrtpNotAvailable(__FUNCTION__);
 }
 
 #endif  // HAVE_SRTP
 
 }  // namespace cricket