Bug 1335730 - delete the map entry when a window unloads and is tracked by the FinderHighlighter. r=jaws

MozReview-Commit-ID: 7vJ4HQwNnPp

--HG--
extra : rebase_source : be5f971a7b3a3552245d20b02341405c761e8dc8

toolkit/modules/FinderHighlighter.jsm

@@ -480,12 +480,10 @@ FinderHighlighter.prototype = {
   onLocationChange() {
     let window = this.finder._getWindow();
     this.hide(window);
-    let dict = this.getForWindow(window);
     this.clear(window);
-    dict.currentFoundRange = dict.lastIteratorParams = dict.previousFoundRange =
-      dict.previousUpdatedRange = null;
-
     this._removeRangeOutline(window);
+
+    gWindows.delete(window.top);
   },
 
   /**