Update more-routing for md-settings

third_party/polymer/v0_8/components/more-routing/more-route-selection.html

 <!--
 Copyright (c) 2015 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
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 <link rel="import" href="../polymer/polymer.html">
-<link rel="import" href="../observe-js/observe-js.html">
 
 <link rel="import" href="more-route-context-aware.html">
 <link rel="import" href="route.html">
 
 <!--
 TODO(nevir): Document.
 -->
 <script>
 
   Polymer({
@@ skipping 90 matching lines @@
       }.bind(this)));
 
       this._observeRoutes();
       this._evaluate();
     },
 
     /**
      * Tracks changes to the routes.
      */
     _observeRoutes: function() {
-      if (this._observer) {
-        this._observer.close();
+      if (this._routeListeners) {
+        for (var i = 0, listener; listener = this._routeListeners[i]; i++) {
+          listener.close();
+        }
       }
-      // TODO(nevir): https://github.com/Polymore/more-routing/issues/24
-      this._observer = new CompoundObserver();
-      for (var i = 0, routeInfo; routeInfo = this._routeInfo[i]; i++) {
-        this._observer.addPath(routeInfo.model, 'active');
-      }
-      this._observer.open(this._evaluate.bind(this));
+
+      this._routeListeners = this._routeInfo.map(function(routeInfo) {
+        return routeInfo.model.__subscribe(this._evaluate.bind(this));
+      }.bind(this));
     },
 
     _evaluate: function() {
       var newIndex = -1;
       var newRoute = null;
       var oldIndex = this.selectedIndex;
 
       for (var i = 0, routeInfo; routeInfo = this._routeInfo[i]; i++) {
         if (routeInfo.model && routeInfo.model.active) {
           newIndex = routeInfo.index;
@@ skipping 49 matching lines @@
             // Equally specific; we fall back to the default (and hopefully
             // stable) sort order.
             return 0;
           }
         }
       });
     },
 
   });
 </script>