Merge branch 'master' into 3.0-preview

src/my-view404.js

@@ -25,13 +25,6 @@ class MyView404 extends PolymerElement {
   }
 
   static get is() { return 'my-view404'; }
-  static get properties() {
-    return {
-      // This shouldn't be neccessary, but the Analyzer isn't picking up
-      // Polymer.Element#rootPath
-      rootPath: String,
-    };
-  }
 }
 
 window.customElements.define(MyView404.is, MyView404);