Make class of static functions in rtp_to_ntp.h:

webrtc/modules/rtp_rtcp/include/remote_ntp_time_estimator.h

Index: webrtc/modules/rtp_rtcp/include/remote_ntp_time_estimator.h
diff --git a/webrtc/modules/rtp_rtcp/include/remote_ntp_time_estimator.h b/webrtc/modules/rtp_rtcp/include/remote_ntp_time_estimator.h
index cab488f3eab74251c2da7d4025e0826e2675e7b5..118df4c4cf58356eb5eecb78f4c6dcf37027cbdb 100644
--- a/webrtc/modules/rtp_rtcp/include/remote_ntp_time_estimator.h
+++ b/webrtc/modules/rtp_rtcp/include/remote_ntp_time_estimator.h
@@ -14,7 +14,7 @@
 #include <memory>
 
 #include "webrtc/base/constructormagic.h"
-#include "webrtc/system_wrappers/include/rtp_to_ntp.h"
+#include "webrtc/system_wrappers/include/rtp_to_ntp_estimator.h"
 
 namespace webrtc {
 
@@ -43,7 +43,7 @@ class RemoteNtpTimeEstimator {
  private:
   Clock* clock_;
   std::unique_ptr<TimestampExtrapolator> ts_extrapolator_;
-  RtcpMeasurements rtcp_list_;
+  RtpToNtpEstimator rtp_to_ntp_;
   int64_t last_timing_log_ms_;
   RTC_DISALLOW_COPY_AND_ASSIGN(RemoteNtpTimeEstimator);
 };