Retrial of the first step to port file_util::CountFilesCreatedAfter()....

base/time.h

 // Copyright (c) 2006-2008 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 time, internally represented as
 // microseconds (s/1,000,000) since a platform-dependent epoch.  Each
 // platform's epoch, along with other system-dependent clock interface
 // routines, is defined in time_PLATFORM.cc.
 //
 // TimeDelta represents a duration of time, internally represented in
@@ skipping 189 matching lines @@
   // Returns true if the time object has not been initialized.
   bool is_null() const {
     return us_ == 0;
   }
 
   // Returns the current time. Watch out, the system might adjust its clock
   // in which case time will actually go backwards. We don't guarantee that
   // times are increasing, or that two calls to Now() won't be the same.
   static Time Now();
 
+  // Returns the current time. Same as Now() except that this function always
+  // uses system time so that there are no discrepancies between the returned
+  // time and system time even on virtual environments including our test bot.
+  // For timing sensitive unittests, this function should be used.
+  static Time NowFromSystemTime();
+
   // Converts to/from time_t in UTC and a Time class.
   // TODO(brettw) this should be removed once everybody starts using the |Time|
   // class.
   static Time FromTimeT(time_t tt);
   time_t ToTimeT() const;
 
   // Converts time to/from a double which is the number of seconds since epoch
   // (Jan 1, 1970).  Webkit uses this format to represent time.
   static Time FromDoubleT(double dt);
   double ToDoubleT() const;
@@ skipping 249 matching lines @@
 #endif
 };
 
 inline TimeTicks TimeDelta::operator+(TimeTicks t) const {
   return TimeTicks(t.ticks_ + delta_);
 }
 
 }  // namespace base
 
 #endif  // BASE_TIME_H_