Backed out changeset 4b8c3e09e73f (bug 1510351) for ES Lint failure. CLOSED TREE

browser/actors/PluginChild.jsm

@@ -1015,5 +1015,9 @@ class PluginChild extends ActorChild {
     this.mm.sendAsyncMessage("PluginContent:ShowPluginCrashedNotification",
                                  { messageString, pluginID });
 
+    // Remove the notification when the page is reloaded.
+    doc.defaultView.top.addEventListener("unload", event => {
+      this.hideNotificationBar("plugin-crashed");
+    });
   }
 }