From c8acc183c23159aa9febe576dcbf3fe6eb4af456 Mon Sep 17 00:00:00 2001
From: Steven Orvell <sorvell@google.com>
Date: Mon, 11 Dec 2017 11:44:13 -0800
Subject: [PATCH] Replace `disconnectedCallback` stub since this change is
 breaking.

---
 lib/mixins/properties-mixin.html | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/lib/mixins/properties-mixin.html b/lib/mixins/properties-mixin.html
index 612b6a65..2298799b 100644
--- a/lib/mixins/properties-mixin.html
+++ b/lib/mixins/properties-mixin.html
@@ -200,6 +200,16 @@ subject to an additional IP rights grant found at http://polymer.github.io/PATEN
         this._enableProperties();
       }
 
+      /**
+       * Called when the element is removed from a document
+       * @suppress {missingProperties} Super may or may not implement the callback
+       */
+      disconnectedCallback() {
+        if (super.disconnectedCallback) {
+          super.disconnectedCallback();
+        }
+      }
+
     }
 
     return PropertiesMixin;