Bug 1430173 - Reduce the precision of all explicit clocks to 2ms. r=baku, a=RyanVM

Backport to ESR where we don't have the ResistFingerprinting component.

MozReview-Commit-ID: 9bjycHjR3SF

--HG--
extra : transplant_source : %EA%03%21%0A%E9%3F%8E%CD%7C%D79f%96%85%96%00%5D%7F%95X

dom/console/Console.cpp

@@ -30,6 +30,7 @@
 #include "nsContentUtils.h"
 #include "nsDocShell.h"
 #include "nsProxyRelease.h"
+#include "mozilla/TimerClamping.h"
 #include "mozilla/ConsoleTimelineMarker.h"
 #include "mozilla/TimestampTimelineMarker.h"
 
@@ -1338,7 +1339,7 @@ Console::MethodInternal(JSContext* aCx, MethodName aMethodName,
       TimeDuration duration =
         mozilla::TimeStamp::Now() - workerPrivate->NowBaseTimeStamp();
 
-      monotonicTimer = duration.ToMilliseconds();
+      monotonicTimer = TimerClamping::ReduceMsTimeValue(duration.ToMilliseconds());
     }
   }