[Multi Profile] Add "Delete this user" button for singleton profiles.

chrome/browser/resources/options/personal_options.js

 // Copyright (c) 2011 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.
 
 cr.define('options', function() {
 
   var OptionsPage = options.OptionsPage;
   var ArrayDataModel = cr.ui.ArrayDataModel;
 
   // State variables.
@@ skipping 42 matching lines @@
       };
 
       // Profiles.
       var profilesList = $('profiles-list');
       options.personal_options.ProfileList.decorate(profilesList);
       profilesList.autoExpands = true;
 
       profilesList.onchange = function(event) {
         var selectedProfile = profilesList.selectedItem;
         var hasSelection = selectedProfile != null;
+        var hasOneProfile = profilesList.dataModel.length <= 1;

[James Hawkins, 2011/10/08 18:17:39]

What if the length is 0?  I don't think this variable name is very good;
hasSingleProfile is more accurate.

[binji, 2011/10/10 17:23:03]

Done.

         $('profiles-manage').disabled = !hasSelection;
-        $('profiles-delete').disabled = !hasSelection;
+        $('profiles-delete').disabled = !hasOneProfile && !hasSelection;
       };
       $('profiles-create').onclick = function(event) {
         chrome.send('createProfile');
       };
       $('profiles-manage').onclick = function(event) {
         var selectedProfile = self.getSelectedProfileItem_();
         if (selectedProfile)
           ManageProfileOverlay.showManageDialog(selectedProfile);
       };
       $('profiles-delete').onclick = function(event) {
@@ skipping 138 matching lines @@
       }
       return null;
     },
 
     /**
      * Display the correct dialog layout, depending on how many profiles are
      * available.
      * @param {number} numProfiles The number of profiles to display.
      */
     setProfileViewSingle_: function(numProfiles) {
-      $('profiles-list').hidden = numProfiles <= 1;
-      $('profiles-single-message').hidden = numProfiles > 1;
-      $('profiles-manage').hidden = numProfiles <= 1;
-      $('profiles-delete').hidden = numProfiles <= 1;
+      var hasOneProfile = numProfiles <= 1;
+      $('profiles-list').hidden = hasOneProfile;
+      $('profiles-single-message').hidden = !hasOneProfile;
+      $('profiles-manage').hidden = hasOneProfile;
+      $('profiles-delete').textContent = hasOneProfile ?
+          templateData.profilesDeleteSingle :
+          templateData.profilesDelete;
     },
 
     /**
      * Adds all |profiles| to the list.
      * @param {Array.<Object>} An array of profile info objects.
      *     each object is of the form:
      *       profileInfo = {
      *         name: "Profile Name",
      *         iconURL: "chrome://path/to/icon/image",
      *         filePath: "/path/to/profile/data/on/disk",
@@ skipping 93 matching lines @@
       PersonalOptions.getInstance()[name + '_'](value);
     };
   });
 
   // Export
   return {
     PersonalOptions: PersonalOptions
   };
 
 });