Split NQE to multiple files

net/nqe/network_quality_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_NETWORK_QUALITY_OBSERVATION_H_
+#define NET_NQE_NETWORK_QUALITY_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 {
+
+// Records observations of network quality metrics (such as round trip time
+// or throughput), along with the time the observation was made. Observations
+// can be made at several places in the network stack, thus the observation
+// source is provided as well. ValueType must be numerical so that statistics
+// such as median, average can be computed.
+template <typename ValueType>
+struct NET_EXPORT_PRIVATE Observation {
+  Observation(const ValueType& value,
+              base::TimeTicks timestamp,
+              NetworkQualityObservationSource source)
+      : value(value), timestamp(timestamp), source(source) {
+    DCHECK(!timestamp.is_null());
+  }
+  ~Observation() {}
+
+  // Value of the observation.
+  const ValueType value;
+
+  // Time when the observation was taken.
+  const base::TimeTicks timestamp;
+
+  // The source of the observation.
+  const NetworkQualityObservationSource source;
+};
+
+}  // namespace internal
+
+}  // namespace nqe
+
+}  // namespace net
+
+#endif  // NET_NQE_NETWORK_QUALITY_OBSERVATION_H_