crank timeBeginPeriod to 4ms

base/time/time_win.cc

 // 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.
 
 
 // Windows Timer Primer
 //
 // A good article:  http://www.ddj.com/windows/184416651
 // A good mozilla bug:  http://bugzilla.mozilla.org/show_bug.cgi?id=363258
 //
@@ skipping 164 matching lines @@
   high_resolution_timer_enabled_ = enable;
 }
 
 // static
 bool Time::ActivateHighResolutionTimer(bool activating) {
   if (!high_resolution_timer_enabled_ && activating)
     return false;
 
   // Using anything other than 1ms makes timers granular
   // to that interval.
-  const int kMinTimerIntervalMs = 1;
+  const int kMinTimerIntervalMs = 4;
   MMRESULT result;
   if (activating) {
     result = timeBeginPeriod(kMinTimerIntervalMs);
     high_resolution_timer_activated_++;
   } else {
     result = timeEndPeriod(kMinTimerIntervalMs);
     high_resolution_timer_activated_--;
   }
   return result == TIMERR_NOERROR;
 }
@@ skipping 331 matching lines @@
     return TimeTicks() + TimeDelta::FromMilliseconds(timeGetTime());
   }
 }
 
 // TimeDelta ------------------------------------------------------------------
 
 // static
 TimeDelta TimeDelta::FromQPCValue(LONGLONG qpc_value) {
   return TimeDelta(GetHighResNowSingleton()->QPCValueToMicroseconds(qpc_value));
 }