Update Polymer components.

third_party/polymer/components/app-route/test/observer-tester.html

+<!--
+@license
+Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+-->
   <link rel='import' href='../app-route.html'>
   <link rel='import' href='../app-location.html'>
 
 
 
   <dom-module id="observer-tester">
     <template>
       <app-location route="{{route}}"></app-location>
       <app-route
         route="{{route}}"
@@ skipping 18 matching lines @@
             value: false,
             observer: 'checkActive'
           }
         },
         checkActive: function(active) {
           var x = 1;
         }
       });
     </script>
   </dom-module>