3 files changed, 9 insertions, 9 deletions
diff --git a/dom/console/Console.cpp b/dom/console/Console.cpp
index 1ecf1f7fdb..ff5a921673 100755
--- a/dom/console/Console.cpp
+++ b/dom/console/Console.cpp
@@ -1336,10 +1336,7 @@ Console::MethodInternal(JSContext* aCx, MethodName aMethodName,
       WorkerPrivate* workerPrivate = GetCurrentThreadWorkerPrivate();
       MOZ_ASSERT(workerPrivate);
 
-      TimeDuration duration =
-        mozilla::TimeStamp::Now() - workerPrivate->CreationTimeStamp();
-
-      monotonicTimer = TimerClamping::ReduceMsTimeValue(duration.ToMilliseconds());
+      monotonicTimer = workerPrivate->TimeStampToDOMHighRes(TimeStamp::Now());
     }
   }
 
diff --git a/dom/events/Event.cpp b/dom/events/Event.cpp
index 4e39675dae..4b9776c0a5 100755
--- a/dom/events/Event.cpp
+++ b/dom/events/Event.cpp
@@ -1146,15 +1146,11 @@ Event::TimeStampImpl() const
     return perf->GetDOMTiming()->TimeStampToDOMHighRes(mEvent->mTimeStamp);
   }
 
-  // For dedicated workers, we should make times relative to the creation time
-  // of the worker, which is the same as the timebase for performance.now().
   workers::WorkerPrivate* workerPrivate =
     workers::GetCurrentThreadWorkerPrivate();
   MOZ_ASSERT(workerPrivate);
 
-  TimeDuration duration =
-    mEvent->mTimeStamp - workerPrivate->CreationTimeStamp();
-  return duration.ToMilliseconds();
+  return workerPrivate->TimeStampToDOMHighRes(mEvent->mTimeStamp);
 }
 
 bool
diff --git a/dom/workers/WorkerPrivate.h b/dom/workers/WorkerPrivate.h
index e15beb9551..28283bed78 100644
--- a/dom/workers/WorkerPrivate.h
+++ b/dom/workers/WorkerPrivate.h
@@ -577,6 +577,13 @@ public:
     return mCreationTimeHighRes;
   }
 
+  DOMHighResTimeStamp TimeStampToDOMHighRes(const TimeStamp& aTimeStamp) const
+  {
+    MOZ_ASSERT(!aTimeStamp.IsNull());
+    TimeDuration duration = aTimeStamp - mCreationTimeStamp;
+    return duration.ToMilliseconds();
+  }
+
   nsIPrincipal*
   GetPrincipal() const
   {