Store network quality samples so we can compute percentiles.

net/base/network_quality.cc

+// Copyright 2015 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.
+
+#include "net/base/network_quality.h"
+
+#include "base/logging.h"
+
+namespace {
+
+// If two double values are within |kDelta| of each other, they are assumed to
+// be equal.
+const double kDelta = 0.001;
+
+}  // namespace
+
+namespace net {
+
+NetworkQuality::NetworkQuality(const base::TimeDelta& rtt,
+                               uint64_t downlink_throughput_kbps,
+                               double confidence)
+    : rtt_(rtt),
+      downlink_throughput_kbps_(downlink_throughput_kbps),
+      confidence_(confidence) {
+  DCHECK_GE(rtt_, base::TimeDelta());
+  DCHECK_GE(downlink_throughput_kbps_, 0U);
+  DCHECK_GE(confidence_, 0 - kDelta);
+  DCHECK_LE(confidence_, 1 + kDelta);
+}
+
+NetworkQuality::~NetworkQuality() {
+}
+
+}  // namespace net