Remove duplicate domHighResTimestamp conversion in NavigationTiming

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

Index: third_party/WebKit/Source/core/timing/PerformanceBase.h
diff --git a/third_party/WebKit/Source/core/timing/PerformanceBase.h b/third_party/WebKit/Source/core/timing/PerformanceBase.h
index ac699abc9ea9db316cf17b4f6d9c0eeedcbeecab..d455a48b1a76c0c62d027793404053bd2bf8457d 100644
--- a/third_party/WebKit/Source/core/timing/PerformanceBase.h
+++ b/third_party/WebKit/Source/core/timing/PerformanceBase.h
@@ -74,6 +74,10 @@ class CORE_EXPORT PerformanceBase : public EventTargetWithInlineData {
   // http://www.w3.org/TR/hr-time-2/#privacy-security
   static double clampTimeResolution(double timeSeconds);
 
+  static DOMHighResTimeStamp monotonicTimeToDOMHighResTimeStamp(
+      double timeOrigin,
+      double monotonicTime);
+
   // Translate given platform monotonic time in seconds into a high resolution
   // DOMHighResTimeStamp in milliseconds. The result timestamp is relative to
   // document's time origin and has a time resolution that is safe for