ios/web/navigation/time_smoother.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef IOS_WEB_NAVIGATION_TIME_SMOOTHER_H_
   6 #define IOS_WEB_NAVIGATION_TIME_SMOOTHER_H_
   7
   8 #include "base/time/time.h"
   9
  10 namespace web {
  11
  12 // Helper class to smooth out runs of duplicate timestamps while still
  13 // allowing time to jump backwards.
  14 //
  15 // Duplicated from NavigationControllerImpl (until we have a better
  16 // idea how to handle NavigationController implementation overlap
  17 // in general).
  18 class TimeSmoother {
  19  public:
  20   // Returns |t| with possibly some time added on.
  21   base::Time GetSmoothedTime(base::Time t);
  22
  23  private:
  24   // |low_water_mark_| is the first time in a sequence of adjusted
  25   // times and |high_water_mark_| is the last.
  26   base::Time low_water_mark_;
  27   base::Time high_water_mark_;
  28 };
  29
  30 }  // namespace web
  31
  32 #endif  // IOS_WEB_NAVIGATION_TIME_SMOOTHER_H_