Bug 1839922 - Remove usage of {Has,Get}Attr(kNameSpaceID_None, ..). r=edgar

We have more readable and faster versions (that just omit the namespace
arg).

Mostly done via sed, with a couple helpers to use the faster lookups
where possible.

Differential Revision: https://phabricator.services.mozilla.com/D181795

dom/html/HTMLTextAreaElement.cpp

@@ -675,7 +675,7 @@ HTMLTextAreaElement::SubmitNamesValues(FormData* aFormData) {
   // Get the name (if no name, no submit)
   //
   nsAutoString name;
-  GetAttr(kNameSpaceID_None, nsGkAtoms::name, name);
+  GetAttr(nsGkAtoms::name, name);
   if (name.IsEmpty()) {
     return NS_OK;
   }
@@ -726,7 +726,7 @@ void HTMLTextAreaElement::SaveState() {
     if (state) {
       // We do not want to save the real disabled state but the disabled
       // attribute.
-      state->disabled() = HasAttr(kNameSpaceID_None, nsGkAtoms::disabled);
+      state->disabled() = HasAttr(nsGkAtoms::disabled);
       state->disabledSet() = true;
     }
   }
@@ -1025,7 +1025,7 @@ void HTMLTextAreaElement::UpdateValueMissingValidityState() {
 
 void HTMLTextAreaElement::UpdateBarredFromConstraintValidation() {
   SetBarredFromConstraintValidation(
-      HasAttr(kNameSpaceID_None, nsGkAtoms::readonly) ||
+      HasAttr(nsGkAtoms::readonly) ||
       HasFlag(ELEMENT_IS_DATALIST_OR_HAS_DATALIST_ANCESTOR) || IsDisabled());
 }