Delete class NullRtpData and function NullObjectRtpData

webrtc/modules/rtp_rtcp/include/rtp_rtcp_defines.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 387 matching lines @@
 
 inline int32_t NullRtpFeedback::OnInitializeDecoder(
     int8_t payload_type,
     const char payloadName[RTP_PAYLOAD_NAME_SIZE],
     int frequency,
     size_t channels,
     uint32_t rate) {
   return 0;
 }
 
-// Null object version of RtpData.
-class NullRtpData : public RtpData {
- public:
-  ~NullRtpData() override {}
-
-  int32_t OnReceivedPayloadData(const uint8_t* payload_data,
-                                size_t payload_size,
-                                const WebRtcRTPHeader* rtp_header) override;
-};
-
-inline int32_t NullRtpData::OnReceivedPayloadData(
-    const uint8_t* payload_data,
-    size_t payload_size,
-    const WebRtcRTPHeader* rtp_header) {
-  return 0;
-}
-
 // Statistics about packet loss for a single directional connection. All values
 // are totals since the connection initiated.
 struct RtpPacketLossStats {
   // The number of packets lost in events where no adjacent packets were also
   // lost.
   uint64_t single_packet_loss_count;
   // The number of events in which more than one adjacent packet was lost.
   uint64_t multiple_packet_loss_event_count;
   // The number of packets lost in events where more than one adjacent packet
   // was lost.
@@ skipping 26 matching lines @@
 class TransportSequenceNumberAllocator {
  public:
   TransportSequenceNumberAllocator() {}
   virtual ~TransportSequenceNumberAllocator() {}
 
   virtual uint16_t AllocateSequenceNumber() = 0;
 };
 
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_INCLUDE_RTP_RTCP_DEFINES_H_