GOAWAY open QUIC sessions if clock skew is detected

net/quic/chromium/quic_clock_skew_detector.h

+// Copyright (c) 2012 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_QUIC_CHROMIUM_QUIC_CLOCK_SKEW_DETECTOR_H_
+#define NET_QUIC_CHROMIUM_QUIC_CLOCK_SKEW_DETECTOR_H_
+
+#include "base/time/time.h"
+#include "net/base/net_export.h"
+
+namespace net {
+
+class NET_EXPORT_PRIVATE QuicClockSkewDetector {
+ public:
+  QuicClockSkewDetector(base::TimeTicks ticks_time, base::Time wall_time);
+
+  // Returns true if the delta between |wall_now| and |last_wall_time_| is
+  // more than one second larger than the delta between |ticks_now| and
+  // |last_ticks_time_|.  Updates |last_ticks_time_| and |last_wall_time_|.
+  bool ClockSkewDetected(base::TimeTicks ticks_now, base::Time wall_now);
+
+ private:
+  // Clock skew detection members
+  base::TimeTicks last_ticks_time_;
+  base::Time last_wall_time_;
+};
+
+}  // namespace net
+
+#endif  // NET_QUIC_CHROMIUM_QUIC_CLOCK_SKEW_DETECTOR_H_