base: Add base::TimeTicks::IsHighResNowFastAndReliable

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 471 matching lines @@
 TimeTicks TimeTicks::Now() {
   return TimeTicks() + now_function();
 }
 
 // static
 TimeTicks TimeTicks::HighResNow() {
   return TimeTicks() + HighResNowSingleton::GetInstance()->Now();
 }
 
 // static
+bool TimeTicks::IsHighResNowFastAndReliable() {
+  return CPUReliablySupportsHighResTime();
+}
+
+// static
 TimeTicks TimeTicks::ThreadNow() {
   NOTREACHED();
   return TimeTicks();
 }
 
 // static
 TimeTicks TimeTicks::NowFromSystemTraceTime() {
   return HighResNow();
 }
 
@@ skipping 21 matching lines @@
   }
 }
 
 // TimeDelta ------------------------------------------------------------------
 
 // static
 TimeDelta TimeDelta::FromQPCValue(LONGLONG qpc_value) {
   return TimeDelta(
       HighResNowSingleton::GetInstance()->QPCValueToMicroseconds(qpc_value));
 }