ash: Improve low-battery notification thresholds.

ash/system/chromeos/power/power_status.h

 // Copyright (c) 2013 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 ASH_SYSTEM_CHROMEOS_POWER_POWER_STATUS_H_
 #define ASH_SYSTEM_CHROMEOS_POWER_POWER_STATUS_H_
 
 #include "ash/ash_export.h"
 #include "base/basictypes.h"
 #include "base/observer_list.h"
@@ skipping 44 matching lines @@
 
   // Gets the global instance. Initialize must be called first.
   static PowerStatus* Get();
 
   // Returns true if |time|, a time returned by GetBatteryTimeToEmpty() or
   // GetBatteryTimeToFull(), should be displayed in the UI.
   // Less-than-a-minute or very large values aren't displayed.
   static bool ShouldDisplayBatteryTime(const base::TimeDelta& time);
 
   // Copies the hour and minute components of |time| to |hours| and |minutes|.
+  // The minute component is rounded rather than truncated: a |time| value
+  // corresponding to 92 seconds will produce a |minutes| value of 2, for
+  // example.
   static void SplitTimeIntoHoursAndMinutes(const base::TimeDelta& time,
                                            int* hours,
                                            int* minutes);
 
   // Adds or removes an observer.
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   // Requests updated status from the power manager.
   void RequestStatusUpdate();
@@ skipping 68 matching lines @@
   // Current state.
   power_manager::PowerSupplyProperties proto_;
 
   DISALLOW_COPY_AND_ASSIGN(PowerStatus);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_CHROMEOS_POWER_POWER_STATUS_H_