Split NQE to multiple files

net/nqe/weighted_observation.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef NET_NQE_WEIGHTED_OBSERVATION_H_
+#define NET_NQE_WEIGHTED_OBSERVATION_H_
+
+#include <vector>
+
+#include "base/gtest_prod_util.h"
+#include "base/macros.h"
+#include "base/time/time.h"
+#include "net/base/net_export.h"
+#include "net/nqe/network_quality_observation_source.h"
+
+namespace net {
+
+namespace nqe {
+
+namespace internal {
+
+// Holds an observation and its weight.
+template <typename ValueType>
+struct NET_EXPORT_PRIVATE WeightedObservation {
+  WeightedObservation(ValueType value, double weight)
+      : value(value), weight(weight) {}
+  WeightedObservation(const WeightedObservation& other)
+      : WeightedObservation(other.value, other.weight) {}
+
+  WeightedObservation& operator=(const WeightedObservation& other) {
+    value = other.value;
+    weight = other.weight;
+    return *this;
+  }
+
+  // Required for sorting the samples in the ascending order of values.
+  bool operator<(const WeightedObservation& other) const {
+    return (value < other.value);
+  }
+
+  // Value of the sample.
+  ValueType value;
+
+  // Weight of the sample. This is computed based on how much time has passed
+  // since the sample was taken.
+  double weight;
+};
+
+}  // namespace internal
+
+}  // namespace nqe
+
+}  // namespace net
+
+#endif  // NET_NQE_WEIGHTED_OBSERVATION_H_