Bug 903372 - Removal of xml:base. r=baku

Differential Revision: https://phabricator.services.mozilla.com/D8965

dom/html/HTMLAreaElement.cpp

@@ -109,8 +109,8 @@ HTMLAreaElement::BindToTree(nsIDocument* aDocument, nsIContent* aParent,
 void
 HTMLAreaElement::UnbindFromTree(bool aDeep, bool aNullParent)
 {
-  // If this link is ever reinserted into a document, it might
-  // be under a different xml:base, so forget the cached state now.
+  // Without removing the link state we risk a dangling pointer
+  // in the mStyledLinks hashtable
   Link::ResetLinkState(false, Link::ElementHasHref());
 
   nsGenericHTMLElement::UnbindFromTree(aDeep, aNullParent);