[MD settings] update settings title bar

chrome/browser/resources/settings/settings_ui/breadcrumb.js

-// Copyright 2015 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-/**
- * @fileoverview
- * 'settings-breadcrumb' displays the breadcrumb.
- *
- * Example:
- *
- *     <settings-breadcrumb current-route="{{currentRoute}}">
- *     </settings-breadcrumb>
- */
-Polymer({
-  is: 'settings-breadcrumb',
-
-  properties: {
-    /**
-     * The current active route.
-     */
-    currentRoute: {
-      type: Object,
-      notify: true,
-    },
-
-    /**
-     * Page titles for the currently active route.
-     */
-    currentRouteTitles: {
-      type: Object,
-    },
-  },
-
-  /** @private */
-  onTapPage_: function() {
-    this.currentRoute = {
-      page: this.currentRoute.page,
-      section: '',
-      subpage: [],
-    };
-  },
-
-  /** @private */
-  onTapSubpage_: function(event) {
-    var clickedIndex = event.target.dataset.subpageIndex;
-    this.currentRoute = {
-      page: this.currentRoute.page,
-      section: this.currentRoute.section,
-      subpage: this.currentRoute.subpage.slice(0, clickedIndex + 1),
-    };
-  },
-});