Move RtcpReportBlocks implementation from ReceiveStatistics to ReceiveStatisticsImpl

webrtc/modules/rtp_rtcp/include/receive_statistics.h

 /*
  *  Copyright (c) 2013 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 71 matching lines @@
   // Sets the max reordering threshold in number of packets.
   virtual void SetMaxReorderingThreshold(int max_reordering_threshold) = 0;
 
   // Called on new RTCP stats creation.
   virtual void RegisterRtcpStatisticsCallback(
       RtcpStatisticsCallback* callback) = 0;
 
   // Called on new RTP stats creation.
   virtual void RegisterRtpStatisticsCallback(
       StreamDataCountersCallback* callback) = 0;
-
-  // TODO(danilchap): Make pure virtual when all implmentations of the
-  // ReceiveStatistics interface will implement it.
-  std::vector<rtcp::ReportBlock> RtcpReportBlocks(size_t max_blocks) override;
 };
 
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_INCLUDE_RECEIVE_STATISTICS_H_