Bug 1451169 - Use nsStaticAtom* instead of nsStaticAtom** in Element.h. r=baku

And then fix up everything else that needs to change as well.

MozReview-Commit-ID: GDMfERqdQAc

dom/html/HTMLSharedElement.cpp

@@ -101,8 +101,8 @@ HTMLSharedElement::IsAttributeMapped(const nsAtom* aAttribute) const
 {
   if (mNodeInfo->Equals(nsGkAtoms::dir)) {
     static const MappedAttributeEntry attributes[] = {
-      { &nsGkAtoms::type },
-      // { &nsGkAtoms::compact }, // XXX
+      { nsGkAtoms::type },
+      // { nsGkAtoms::compact }, // XXX
       { nullptr}
     };