Move time constants to base::Time

base/time/time.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.
 
 // Time represents an absolute point in coordinated universal time (UTC),
 // internally represented as microseconds (s/1,000,000) since the Windows epoch
 // (1601-01-01 00:00:00 UTC) (See http://crbug.com/14734).  System-dependent
 // clock interface routines are defined in time_PLATFORM.cc.
 //
 // TimeDelta represents a duration of time, internally represented in
@@ skipping 215 matching lines @@
 }
 
 // For logging use only.
 BASE_EXPORT std::ostream& operator<<(std::ostream& os, TimeDelta time_delta);
 
 // Time -----------------------------------------------------------------------
 
 // Represents a wall clock time in UTC.
 class BASE_EXPORT Time {
  public:
+  static const int64 kHoursPerDay = 24;
   static const int64 kMillisecondsPerSecond = 1000;
   static const int64 kMicrosecondsPerMillisecond = 1000;
   static const int64 kMicrosecondsPerSecond = kMicrosecondsPerMillisecond *
                                               kMillisecondsPerSecond;
   static const int64 kMicrosecondsPerMinute = kMicrosecondsPerSecond * 60;
   static const int64 kMicrosecondsPerHour = kMicrosecondsPerMinute * 60;
   static const int64 kMicrosecondsPerDay = kMicrosecondsPerHour * 24;

[Lei Zhang, 2015/03/16 21:11:49]

Since you are adding |kHoursPerDay|, can you use that here?

[qiankun, 2015/03/17 03:20:35]

Done.

   static const int64 kMicrosecondsPerWeek = kMicrosecondsPerDay * 7;
+  static const int64 kMillisecondsPerDay = kMicrosecondsPerDay / 1000;

[Lei Zhang, 2015/03/16 21:11:49]

Can you put this in order - just under |kMillisecondsPerSecond| above?

[qiankun, 2015/03/17 03:20:35]

Done.

   static const int64 kNanosecondsPerMicrosecond = 1000;
   static const int64 kNanosecondsPerSecond = kNanosecondsPerMicrosecond *
                                              kMicrosecondsPerSecond;
 
   // The representation of Jan 1, 1970 UTC in microseconds since the
   // platform-dependent epoch.
   static const int64 kTimeTToMicrosecondsOffset;
 
 #if !defined(OS_WIN)
   // On Mac & Linux, this value is the delta from the Windows epoch of 1601 to
@@ skipping 504 matching lines @@
 inline TimeTicks TimeDelta::operator+(TimeTicks t) const {
   return TimeTicks(t.ticks_ + delta_);
 }
 
 // For logging use only.
 BASE_EXPORT std::ostream& operator<<(std::ostream& os, TimeTicks time_ticks);
 
 }  // namespace base
 
 #endif  // BASE_TIME_TIME_H_