1 files changed, 16 insertions, 1 deletions
diff --git a/js/src/jsdate.cpp b/js/src/jsdate.cpp
index d73fb93d2..00a8abf84 100644..100755
--- a/js/src/jsdate.cpp
+++ b/js/src/jsdate.cpp
@@ -354,10 +354,22 @@ MakeDate(double day, double time)
 JS_PUBLIC_API(double)
 JS::MakeDate(double year, unsigned month, unsigned day)
 {
+    MOZ_ASSERT(month <= 11);
+    MOZ_ASSERT(day >= 1 && day <= 31);
+
     return ::MakeDate(MakeDay(year, month, day), 0);
 }
 
 JS_PUBLIC_API(double)
+JS::MakeDate(double year, unsigned month, unsigned day, double time)
+{
+    MOZ_ASSERT(month <= 11);
+    MOZ_ASSERT(day >= 1 && day <= 31);
+
+    return ::MakeDate(MakeDay(year, month, day), time);
+}
+
+JS_PUBLIC_API(double)
 JS::YearFromTime(double time)
 {
     return ::YearFromTime(time);
@@ -1232,7 +1244,10 @@ date_parse(JSContext* cx, unsigned argc, Value* vp)
 static ClippedTime
 NowAsMillis()
 {
-    return TimeClip(static_cast<double>(PRMJ_Now()) / PRMJ_USEC_PER_MSEC);
+    const double maxResolutionMs = 2;
+    double timestamp = static_cast<double>(PRMJ_Now()) / PRMJ_USEC_PER_MSEC;
+    timestamp = floor(timestamp / maxResolutionMs) * maxResolutionMs;
+    return TimeClip(timestamp);
 }
 
 bool