MD Settings: Restore focus after exiting various subpages.

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 127 matching lines @@
       },
       readOnly: true,
     },
 
     /** @private */
     showEasyUnlockTurnOffDialog_: {
       type: Boolean,
       value: false,
     },
 // </if>
+
+    /** @private {?Map<string, string>} */
+    focusConfig_: Object,
+  },
+
+  /** @override */
+  ready: function() {
+    this.focusConfig_ = new Map();
+    this.focusConfig_.set(
+        settings.Route.SYNC.path, '#sync-status .subpage-arrow');
+// <if expr="not chromeos">
+    this.focusConfig_.set(
+        settings.Route.MANAGE_PROFILE.path,
+        '#picture-subpage-trigger .subpage-arrow');
+// </if>
+// <if expr="chromeos">
+    this.focusConfig_.set(
+        settings.Route.CHANGE_PICTURE.path,
+        '#picture-subpage-trigger .subpage-arrow');
+    this.focusConfig_.set(
+        settings.Route.LOCK_SCREEN.path, '#lockScreenSubpageTrigger');
+    this.focusConfig_.set(
+        settings.Route.ACCOUNTS.path,
+        '#manage-other-people-subpage-trigger .subpage-arrow');
+// </if>
   },
 
   /** @override */
   attached: function() {
     var profileInfoProxy = settings.ProfileInfoBrowserProxyImpl.getInstance();
     profileInfoProxy.getProfileInfo().then(this.handleProfileInfo_.bind(this));
     this.addWebUIListener('profile-info-changed',
                           this.handleProfileInfo_.bind(this));
 
     profileInfoProxy.getProfileManagesSupervisedUsers().then(
@@ skipping 359 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;
   },
 });