Bug 1660405 - Move away from mozilla::IsNaN in favor of std::isnan. r=nbp,media-playback-reviewers,sergesanspaille,padenot

Differential Revision: https://phabricator.services.mozilla.com/D173035

dom/html/HTMLInputElement.cpp

@@ -1832,7 +1832,7 @@ void HTMLInputElement::SetValueAsDate(JSContext* aCx,
   // At this point we know we're not a file input, so we can just pass "not
   // system" as the caller type, since the caller type only matters in the file
   // input case.
-  if (IsNaN(milliseconds)) {
+  if (std::isnan(milliseconds)) {
     SetValue(u""_ns, CallerType::NonSystem, aRv);
     return;
   }
@@ -1846,7 +1846,7 @@ void HTMLInputElement::SetValueAsDate(JSContext* aCx,
   double year = JS::YearFromTime(milliseconds);
   double month = JS::MonthFromTime(milliseconds);
 
-  if (IsNaN(year) || IsNaN(month)) {
+  if (std::isnan(year) || std::isnan(month)) {
     SetValue(u""_ns, CallerType::NonSystem, aRv);
     return;
   }