Fix chromium-style warnings.

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 303 matching lines @@
 
 class RtcpRttStats {
  public:
   virtual void OnRttUpdate(int64_t rtt) = 0;
 
   virtual int64_t LastProcessedRtt() const = 0;
 
   virtual ~RtcpRttStats() {}
 };
 
-// Null object version of RtpFeedback.
-class NullRtpFeedback : public RtpFeedback {
- public:
-  virtual ~NullRtpFeedback() {}
-
-  int32_t OnInitializeDecoder(int8_t payload_type,
-                              const char payloadName[RTP_PAYLOAD_NAME_SIZE],
-                              int frequency,
-                              size_t channels,
-                              uint32_t rate) override {
-    return 0;
-  }
-
-  void OnIncomingSSRCChanged(uint32_t ssrc) override {}
-  void OnIncomingCSRCChanged(uint32_t csrc, bool added) override {}
-};
-
-// Null object version of RtpData.
-class NullRtpData : public RtpData {
- public:
-  virtual ~NullRtpData() {}
-
-  int32_t OnReceivedPayloadData(const uint8_t* payload_data,
-                                size_t payload_size,
-                                const WebRtcRTPHeader* rtp_header) override {
-    return 0;
-  }
-
-  bool OnRecoveredPacket(const uint8_t* packet, size_t packet_length) override {
-    return true;
-  }
-};
-
 // 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_