Remove chain of methods in RtpRtcp module to get current payload frequency for RTCP SRs

webrtc/modules/rtp_rtcp/source/rtp_sender.h

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 62 matching lines @@
                           const uint32_t frequency,
                           const size_t channels,
                           const uint32_t rate);
 
   int32_t DeRegisterSendPayload(const int8_t payload_type);
 
   void SetSendPayloadType(int8_t payload_type);
 
   int8_t SendPayloadType() const;
 
-  int SendPayloadFrequency() const;
-
   void SetSendingStatus(bool enabled);
 
   void SetSendingMediaStatus(bool enabled);
   bool SendingMedia() const;
 
   void GetDataCounters(StreamDataCounters* rtp_stats,
                        StreamDataCounters* rtx_stats) const;
 
   uint32_t TimestampOffset() const;
   void SetTimestampOffset(uint32_t timestamp);
@@ skipping 337 matching lines @@
   std::map<int8_t, int8_t> rtx_payload_type_map_ GUARDED_BY(send_critsect_);
 
   RateLimiter* const retransmission_rate_limiter_;
 
   RTC_DISALLOW_IMPLICIT_CONSTRUCTORS(RTPSender);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTP_SENDER_H_