Revert of Added DCHECK for monotonicTimeToDOMHighResTimeStamp in PerformanceBase

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 ae34e98b63e9e416fd34afab4f907cd85cd5e2d0..882a008281bcf5d309b7c80a0247cbfeb22701ff 100644
--- a/third_party/WebKit/Source/core/timing/PerformanceBase.h
+++ b/third_party/WebKit/Source/core/timing/PerformanceBase.h
@@ -75,7 +75,6 @@ class CORE_EXPORT PerformanceBase : public EventTargetWithInlineData {
   // http://www.w3.org/TR/hr-time-2/#privacy-security
   static double clampTimeResolution(double timeSeconds);
 
-  // monotonicTime needs to be no smaller than timeOrigin.
   static DOMHighResTimeStamp monotonicTimeToDOMHighResTimeStamp(
       double timeOrigin,
       double monotonicTime);
@@ -83,8 +82,7 @@ class CORE_EXPORT PerformanceBase : public EventTargetWithInlineData {
   // 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
-  // exposing to web. The monotonic time provided needs to be no smaller than
-  // document's time origin.
+  // exposing to web.
   DOMHighResTimeStamp monotonicTimeToDOMHighResTimeStamp(double) const;
   DOMHighResTimeStamp now() const;