Bug 1488938 - Migrate two more nextSibling/previousSibling callers to use element variation;r=Gijs

Differential Revision: https://phabricator.services.mozilla.com/D5184 --HG-- extra : moz-landing-system : lando
2018-09-07 15:31:35 +00:00 · 2018-09-07 15:31:35 +00:00 · 2f2baff3ce
--- a/browser/components/customizableui/DragPositionManager.jsm
+++ b/browser/components/customizableui/DragPositionManager.jsm
@ -283,7 +283,7 @@ AreaPositionManager.prototype = {
  _getVisibleSiblingForDirection(aNode, aDirection) {
    let rv = aNode;
    do {
-      rv = rv[aDirection + "Sibling"];
+      rv = rv[aDirection + "ElementSibling"];
    } while (rv && rv.getAttribute("hidden") == "true");
    return rv;
  },
--- a/toolkit/content/widgets/tabbox.xml
+++ b/toolkit/content/widgets/tabbox.xml
@ -278,7 +278,7 @@
        <body>
        <![CDATA[
          var startTab = this.selectedItem;
-          var next = startTab[aDir == -1 ? "previousSibling" : "nextSibling"];
+          var next = startTab[(aDir == -1 ? "previous" : "next") + "ElementSibling"];
          if (!next && aWrap) {
            next = aDir == -1 ? this.children[this.children.length - 1] :
                                this.children[0];