Remove third_party/polymer from .gitignore

third_party/polymer/v1_0/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
-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="../polymer/polymer.html">
-
-<link rel="import" href="more-route-context-aware.html">
-<link rel="import" href="route.html">
-
-<!--
-TODO(nevir): Document.
--->
-<script>
-
-  Polymer({
-
-    is: 'more-route-selection',
-
-    behaviors: [
-      MoreRouting.ContextAware,
-    ],
-
-    properties: {
-
-      /**
-       * Routes to select from, as either a path expression or route name.
-       *
-       * You can either specify routes via this attribute, or as child nodes
-       * to this element, but not both.
-       *
-       * @type {String|Array<string|MoreRouting.Route>}
-       */
-      routes: {
-        type:     String,
-        observer: '_routesChanged',
-      },
-
-      /**
-       * The selected `MoreRouting.Route` object, or `null`.
-       *
-       * @type {MoreRouting.Route}
-       */
-      selectedRoute: {
-        type:     Object,
-        value:    null,
-        readOnly: true,
-        notify:   true,
-      },
-
-      /**
-       * The index of the selected route (relative to `routes`). -1 when there
-       * is no active route.
-       */
-      selectedIndex: {
-        type:     Number,
-        value:    -1,
-        readOnly: true,
-        notify:   true,
-      },
-
-      /**
-       * The _full_ path expression of the selected route, or `null`.
-       */
-      selectedPath: {
-        type:     String,
-        readOnly: true,
-        notify:   true,
-      },
-
-      /**
-       * The params of the selected route, or an empty object if no route.
-       */
-      selectedParams: {
-        type:     Object,
-        readOnly: true,
-        notify:   true,
-      },
-
-    },
-
-    /**
-     * @event more-route-change fires when a new route is selected.
-     * @detail {{
-     *   newRoute:  MoreRouting.Route, oldRoute: MoreRouting.Route,
-     *   newIndex:  number,  oldIndex:  number,
-     *   newPath:   ?string, oldPath:   ?string,
-     *   newParams: Object,  oldParams: Object,
-     * }}
-     */
-
-    routingReady: function() {
-      this._routesChanged();
-    },
-
-    _routesChanged: function() {
-      if (!this.routingIsReady) return;
-      var routes = this.routes || [];
-      if (typeof routes === 'string') {
-        routes = routes.split(/\s+/);
-      }
-      this._routeInfo = this._sortIndexes(routes.map(function(route, index) {
-        return {
-          model: MoreRouting.getRoute(route, this.parentRoute),
-          index: index,
-        };
-      }.bind(this)));
-
-      this._observeRoutes();
-      this._evaluate();
-    },
-
-    /**
-     * Tracks changes to the routes.
-     */
-    _observeRoutes: function() {
-      if (this._routeListeners) {
-        for (var i = 0, listener; listener = this._routeListeners[i]; i++) {
-          listener.close();
-        }
-      }
-
-      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;
-          newRoute = routeInfo.model;
-          break;
-        }
-      }
-      if (newIndex === oldIndex) return;
-
-      var oldRoute  = this.selectedRoute;
-      var oldPath   = this.selectedPath;
-      var oldParams = this.selectedParams;
-
-      var newPath   = newRoute ? newRoute.fullPath : null;
-      var newParams = newRoute ? newRoute.params   : {};
-
-      this._setSelectedRoute(newRoute);
-      this._setSelectedIndex(newIndex);
-      this._setSelectedPath(newPath);
-      this._setSelectedParams(newParams);
-
-      this.fire('more-route-change', {
-        newRoute:  newRoute,  oldRoute:  oldRoute,
-        newIndex:  newIndex,  oldIndex:  oldIndex,
-        newPath:   newPath,   oldPath:   oldPath,
-        newParams: newParams, oldParams: oldParams,
-      });
-    },
-    /**
-     * We want the most specific routes to match first, so we must create a
-     * mapping of indexes within `routes` that map
-     */
-    _sortIndexes: function(routeInfo) {
-      return routeInfo.sort(function(a, b) {
-        if (!a.model) {
-          return 1;
-        } else if (!b.model) {
-          return -1;
-        // Routes with more path parts are most definitely more specific.
-        } else if (a.model.depth < b.model.depth) {
-          return 1;
-        } if (a.model.depth > b.model.depth) {
-          return -1;
-        } else {
-
-          // Also, routes with fewer params are more specific. For example
-          // `/users/foo` is more specific than `/users/:id`.
-          if (a.model.numParams < b.model.numParams) {
-            return -1;
-          } else if (a.model.numParams > b.model.numParams) {
-            return 1;
-          } else {
-            // Equally specific; we fall back to the default (and hopefully
-            // stable) sort order.
-            return 0;
-          }
-        }
-      });
-    },
-
-  });
-</script>