Move RtpExtension to api/ directory and config.h/.cc to call/.

webrtc/modules/rtp_rtcp/include/flexfec_sender.h

 /*
  *  Copyright (c) 2016 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 WEBRTC_MODULES_RTP_RTCP_INCLUDE_FLEXFEC_SENDER_H_
 #define WEBRTC_MODULES_RTP_RTCP_INCLUDE_FLEXFEC_SENDER_H_
 
 #include <memory>
 #include <vector>
 
-#include "webrtc/config.h"
+#include "webrtc/api/rtpparameters.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/modules/rtp_rtcp/include/flexfec_sender.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_header_extension_map.h"
 #include "webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.h"
 #include "webrtc/modules/rtp_rtcp/source/rtp_packet_to_send.h"
 #include "webrtc/modules/rtp_rtcp/source/ulpfec_generator.h"
 #include "webrtc/rtc_base/array_view.h"
 #include "webrtc/rtc_base/basictypes.h"
 #include "webrtc/rtc_base/random.h"
 #include "webrtc/system_wrappers/include/clock.h"
@@ skipping 56 matching lines @@
 
   // Implementation.
   UlpfecGenerator ulpfec_generator_;
   const RtpHeaderExtensionMap rtp_header_extension_map_;
   const size_t header_extensions_size_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_RTP_RTCP_INCLUDE_FLEXFEC_SENDER_H_