Remove interface directories kept to avoid breaking downstream.

webrtc/modules/rtp_rtcp/interface/remote_ntp_time_estimator.h

Index: webrtc/modules/rtp_rtcp/interface/remote_ntp_time_estimator.h
diff --git a/webrtc/modules/rtp_rtcp/interface/remote_ntp_time_estimator.h b/webrtc/modules/rtp_rtcp/interface/remote_ntp_time_estimator.h
deleted file mode 100644
index d271c9bbd54ba606651e8f75b22d4185727da739..0000000000000000000000000000000000000000
--- a/webrtc/modules/rtp_rtcp/interface/remote_ntp_time_estimator.h
+++ /dev/null
@@ -1,53 +0,0 @@
-/*
- *  Copyright (c) 2014 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.
- */
-
-#ifndef WEBRTC_MODULES_RTP_RTCP_INCLUDE_REMOTE_NTP_TIME_ESTIMATOR_H_
-#define WEBRTC_MODULES_RTP_RTCP_INCLUDE_REMOTE_NTP_TIME_ESTIMATOR_H_
-
-#pragma message("WARNING: rtp_rtcp/interface is DEPRECATED; use include dir.")
-
-#include "webrtc/base/scoped_ptr.h"
-#include "webrtc/system_wrappers/include/rtp_to_ntp.h"
-
-namespace webrtc {
-
-class Clock;
-class TimestampExtrapolator;
-
-// RemoteNtpTimeEstimator can be used to estimate a given RTP timestamp's NTP
-// time in local timebase.
-// Note that it needs to be trained with at least 2 RTCP SR (by calling
-// |UpdateRtcpTimestamp|) before it can be used.
-class RemoteNtpTimeEstimator {
- public:
-  explicit RemoteNtpTimeEstimator(Clock* clock);
-
-  ~RemoteNtpTimeEstimator();
-
-  // Updates the estimator with round trip time |rtt|, NTP seconds |ntp_secs|,
-  // NTP fraction |ntp_frac| and RTP timestamp |rtcp_timestamp|.
-  bool UpdateRtcpTimestamp(int64_t rtt, uint32_t ntp_secs, uint32_t ntp_frac,
-                           uint32_t rtp_timestamp);
-
-  // Estimates the NTP timestamp in local timebase from |rtp_timestamp|.
-  // Returns the NTP timestamp in ms when success. -1 if failed.
-  int64_t Estimate(uint32_t rtp_timestamp);
-
- private:
-  Clock* clock_;
-  rtc::scoped_ptr<TimestampExtrapolator> ts_extrapolator_;
-  RtcpList rtcp_list_;
-  int64_t last_timing_log_ms_;
-  RTC_DISALLOW_COPY_AND_ASSIGN(RemoteNtpTimeEstimator);
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_MODULES_RTP_RTCP_INCLUDE_REMOTE_NTP_TIME_ESTIMATOR_H_