Move RtcpReportBlocks implementation from ReceiveStatistics to ReceiveStatisticsImpl

BUG=webrtc:8016

Review-Url: https://codereview.webrtc.org/2997783002
Cr-Commit-Position: refs/heads/master@{#19327}

webrtc/modules/rtp_rtcp/include/receive_statistics.h

@@ -89,10 +89,6 @@ class ReceiveStatistics : public ReceiveStatisticsProvider {
   // 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

webrtc/modules/rtp_rtcp/source/receive_statistics_impl.cc

@@ -494,7 +494,7 @@ void ReceiveStatisticsImpl::DataCountersUpdated(const StreamDataCounters& stats,
   }
 }
 
-std::vector<rtcp::ReportBlock> ReceiveStatistics::RtcpReportBlocks(
+std::vector<rtcp::ReportBlock> ReceiveStatisticsImpl::RtcpReportBlocks(
     size_t max_blocks) {
   StatisticianMap statisticians = GetActiveStatisticians();
   std::vector<rtcp::ReportBlock> result;

webrtc/modules/rtp_rtcp/source/receive_statistics_impl.h

@@ -15,6 +15,7 @@
 
 #include <algorithm>
 #include <map>
+#include <vector>
 
 #include "webrtc/rtc_base/criticalsection.h"
 #include "webrtc/rtc_base/rate_statistics.h"
@@ -97,6 +98,9 @@ class ReceiveStatisticsImpl : public ReceiveStatistics,
 
   ~ReceiveStatisticsImpl();
 
+  // Implement ReceiveStatisticsProvider.
+  std::vector<rtcp::ReportBlock> RtcpReportBlocks(size_t max_blocks) override;
+
   // Implement ReceiveStatistics.
   void IncomingPacket(const RTPHeader& header,
                       size_t packet_length,