Polymer: Remove unused app-layout element

third_party/polymer/v1_0/components-chromium/app-layout/app-scrollpos-control/app-scrollpos-control-extracted.js

-Polymer({
-      is: 'app-scrollpos-control',
-
-      properties: {
-        /**
-         * The selected page.
-         */
-        selected: {
-          type: String,
-          observer: '_selectedChanged'
-        },
-
-        /**
-         * Reset the scroll position to 0.
-         */
-        reset: {
-          type: Boolean,
-          value: false
-        }
-      },
-
-      observers: [
-        '_updateScrollPos(selected, reset)'
-      ],
-
-      created: function() {
-        this._scrollposMap = {};
-      },
-
-      _selectedChanged: function(selected, old) {
-        if (old != null) {
-          this._scrollposMap[old] = {x: window.pageXOffset, y: window.pageYOffset};
-        }
-      },
-
-      _updateScrollPos: function(selected, reset) {
-        this.debounce('_updateScrollPos', function() {
-          var pos = this._scrollposMap[this.selected];
-          if (pos != null && !this.reset) {
-            this._scrollTo(pos.x, pos.y);
-          } else {
-            this._scrollTo(0, 0);
-          }
-        });
-      },
-
-      _scrollTo: function(x, y) {
-        Polymer.AppLayout.scroll({
-          left: x,
-          top: y,
-          behavior: 'silent'
-        });
-      }
-    });