Remove unnecessary wrapper on DomHighResTimestamp, and clamp resolution to 1 millisecond

third_party/WebKit/Source/core/timing/PerformanceBase.cpp

Index: third_party/WebKit/Source/core/timing/PerformanceBase.cpp
diff --git a/third_party/WebKit/Source/core/timing/PerformanceBase.cpp b/third_party/WebKit/Source/core/timing/PerformanceBase.cpp
index 2b8ea03f51329215022d97cac1c29240c8a2927a..e77a457e81ea5ac75b3d9a7640a116a0dd11d4d3 100644
--- a/third_party/WebKit/Source/core/timing/PerformanceBase.cpp
+++ b/third_party/WebKit/Source/core/timing/PerformanceBase.cpp
@@ -433,9 +433,9 @@ void PerformanceBase::addLongTaskTiming(double startTime,
   if (!hasObserverFor(PerformanceEntry::LongTask))
     return;
   PerformanceEntry* entry = PerformanceLongTaskTiming::create(
-      monotonicTimeToDOMHighResTimeStampInMillis(startTime),
-      monotonicTimeToDOMHighResTimeStampInMillis(endTime), name,
-      culpritFrameSrc, culpritFrameId, culpritFrameName);
+      monotonicTimeToDOMHighResTimeStamp(startTime),
+      monotonicTimeToDOMHighResTimeStamp(endTime), name, culpritFrameSrc,
+      culpritFrameId, culpritFrameName);
   notifyObserversOfEntry(*entry);
 }
 
@@ -562,11 +562,6 @@ DOMHighResTimeStamp PerformanceBase::monotonicTimeToDOMHighResTimeStamp(
       clampTimeResolution(timeInSeconds));
 }
 
-double PerformanceBase::monotonicTimeToDOMHighResTimeStampInMillis(
-    DOMHighResTimeStamp monotonicTime) const {
-  return monotonicTimeToDOMHighResTimeStamp(monotonicTime) * 1000;
-}
-
 DOMHighResTimeStamp PerformanceBase::now() const {
   return monotonicTimeToDOMHighResTimeStamp(monotonicallyIncreasingTime());
 }