MD Settings: Hide Profile Shortcut switch for single-profile machines.

chrome/browser/resources/settings/people_page/manage_profile.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-manage-profile' is the settings subpage containing controls to
  * edit a profile's name, icon, and desktop shortcut.
  */
 Polymer({
@@ skipping 37 matching lines @@
      */
     browserProxy_: {
       type: Object,
       value: function() {
         return settings.ManageProfileBrowserProxyImpl.getInstance();
       },
     },
 
     /**
      * True if the profile shortcuts feature is enabled.
-     * @private
+     * @private {boolean}
      */
-    isProfileShortcutsEnabled_: {
-      type: Boolean,
-      value: function() {
-        return loadTimeData.getBoolean('profileShortcutsEnabled');
-      },
-      readOnly: true,
-    },
+    isProfileShortcutSettingVisible_: false,

[Dan Beam, 2016/11/23 00:29:16]

this should either be

isProfileShortcutSettingVisible_: Boolean,

OR

isProfileShortcutSettingVisible_: {
  type: Boolean,
  value: false,
},

[tommycli, 2016/11/23 19:00:46]

Done.

   },
 
   /** @override */
   attached: function() {
     var setIcons = function(icons) {
       this.availableIcons = icons;
     }.bind(this);
 
     this.addWebUIListener('available-icons-changed', setIcons);
     this.browserProxy_.getAvailableIcons().then(setIcons);
   },
 
   /** @protected */
   currentRouteChanged: function() {
     if (settings.getCurrentRoute() == settings.Route.MANAGE_PROFILE) {
       this.$.name.value = this.profileName;
 
-      if (this.isProfileShortcutsEnabled_) {
-        var setHasProfileShortcut = function(hasProfileShortcut) {
-          this.hasProfileShortcut_ = hasProfileShortcut;
-        }.bind(this);
-        this.browserProxy_.getHasProfileShortcut().then(setHasProfileShortcut);
+      if (loadTimeData.getBoolean('profileShortcutsEnabled')) {
+        this.browserProxy_.getProfileShortcutStatus().then(function(status) {
+          if (status == ProfileShortcutStatus.PROFILE_SHORTCUT_SETTING_HIDDEN) {
+            this.isProfileShortcutSettingVisible_ = false;
+            return;
+          }
+
+          this.isProfileShortcutSettingVisible_ = true;
+          this.hasProfileShortcut_ =
+              status == ProfileShortcutStatus.PROFILE_SHORTCUT_FOUND;
+        }.bind(this));
       }
     }
   },
 
   /**
    * Handler for when the profile name field is changed, then blurred.
    * @private
    * @param {!Event} event
    */
   onProfileNameChanged_: function(event) {
@@ skipping 29 matching lines @@
    * @private
    */
   onHasProfileShortcutChange_: function(event) {
     if (this.hasProfileShortcut_) {
       this.browserProxy_.addProfileShortcut();
     } else {
       this.browserProxy_.removeProfileShortcut();
     }
   }
 });