Add interval estimator to remote bitrate estimator

webrtc/modules/remote_bitrate_estimator/probing_interval_estimator.h

+/*
+ *  Copyright (c) 2016 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_REMOTE_BITRATE_ESTIMATOR_PROBING_INTERVAL_ESTIMATOR_H_
+#define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_PROBING_INTERVAL_ESTIMATOR_H_
+
+#include "webrtc/base/constructormagic.h"
+#include "webrtc/base/optional.h"
+#include "webrtc/modules/remote_bitrate_estimator/aimd_rate_control.h"
+
+namespace webrtc {
+
+class ProbingIntervalEstimator {
+ public:
+  explicit ProbingIntervalEstimator(
+      const AimdRateControl* const aimd_rate_control);
+
+  ProbingIntervalEstimator(int min_interval_ms,
+                           int max_interval_ms,
+                           const AimdRateControl* const aimd_rate_control);

[stefan-webrtc, 2016/11/08 13:06:28]

Do we need this constructor?

[michaelt, 2016/11/09 07:54:45]

Yes, its used for testing. 

+  rtc::Optional<int> GetIntervalMs() const;
+
+ private:
+  const int min_interval_ms_;
+  const int max_interval_ms_;
+  const AimdRateControl* const aimd_rate_control_;
+  RTC_DISALLOW_COPY_AND_ASSIGN(ProbingIntervalEstimator);
+};
+
+}  // namespace webrtc
+#endif  // WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_PROBING_INTERVAL_ESTIMATOR_H_