MD Settings: Add route for the Import Data dialog at /importData.

chrome/browser/resources/settings/people_page/people_page.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-people-page' is the settings page containing sign-in settings.
  */
 Polymer({
   is: 'settings-people-page',
@@ skipping 132 matching lines @@
           'easy-unlock-enabled-status',
           this.handleEasyUnlockEnabledStatusChanged_.bind(this));
       this.easyUnlockBrowserProxy_.getEnabledStatus().then(
           this.handleEasyUnlockEnabledStatusChanged_.bind(this));
     }
 </if>
   },
 
   /** @protected */
   currentRouteChanged: function() {
+    this.showImportDataDialog_ =
+        settings.getCurrentRoute() == settings.Route.IMPORT_DATA;
+
     if (settings.getCurrentRoute() == settings.Route.SIGN_OUT) {
       // If the sync status has not been fetched yet, optimistically display
       // the disconnect dialog. There is another check when the sync status is
       // fetched. The dialog will be closed then the user is not signed in.
       if (this.syncStatus && !this.syncStatus.signedIn)
         settings.navigateToPreviousRoute();
       else
         this.$.disconnectDialog.showModal();
     } else if (this.$.disconnectDialog.open) {
       this.$.disconnectDialog.close();
@@ skipping 189 matching lines @@
    * @return {string}
    */
   getDomainHtml_: function(domain) {
     var innerSpan =
         '<span id="managed-by-domain-name">' + domain + '</span>';
     return loadTimeData.getStringF('domainManagedProfile', innerSpan);
   },
 
   /** @private */
   onImportDataTap_: function() {
-    this.showImportDataDialog_ = true;
+    settings.navigateTo(settings.Route.IMPORT_DATA);
   },
 
   /** @private */
   onImportDataDialogClosed_: function() {
-    this.showImportDataDialog_ = false;
+    settings.navigateToPreviousRoute();
   },
 </if>
 
   /**
    * @private
    * @param {string} domain
    * @return {string}
    */
   getDisconnectExplanationHtml_: function(domain) {
 <if expr="not chromeos">
@@ skipping 69 matching lines @@
 
   /**
    * @param {!settings.SyncStatus} syncStatus
    * @return {boolean} Whether to show the "Sign in to Chrome" button.
    * @private
    */
   showSignin_: function(syncStatus) {
     return !!syncStatus.signinAllowed && !syncStatus.signedIn;
   },
 });