chrome://settings should allow duplicate profile names.

chrome/browser/ui/webui/options/manage_profile_browsertest.js

 // Copyright 2013 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.
 
 // None of these tests is relevant for Chrome OS.
 GEN('#if !defined(OS_CHROMEOS)');
 
 /**
  * TestFixture for ManageProfileOverlay and CreateProfileOverlay WebUI testing.
  * @extends {testing.Test}
@@ skipping 234 matching lines @@
     return options.SupervisedUserListData.getInstance().promise_;
   }).then(function() {
     assertTrue($('create-profile-ok').disabled);
     assertFalse($('supervised-user-import-existing') == null);
 
     // A profile which already exists on the device.
     nameField.value = 'Test';
     ManageProfileOverlay.getInstance().onNameChanged_('create');
     return options.SupervisedUserListData.getInstance().promise_;
   }).then(function() {
-    assertTrue($('create-profile-ok').disabled);
+    assertFalse($('create-profile-ok').disabled);
     assertTrue($('supervised-user-import-existing') == null);
 
     // A profile which does not exist on the device, but there is a profile with
     // the same name already on the device.
     nameField.value = 'SameName';
     ManageProfileOverlay.getInstance().onNameChanged_('create');
     return options.SupervisedUserListData.getInstance().promise_;
   }).then(function() {
     assertTrue($('create-profile-ok').disabled);
     assertFalse($('supervised-user-import-existing') == null);
@@ skipping 380 matching lines @@
 
   // Select another icon and check if the profile name was updated.
   var oldName = nameEl.value;
   gridEl.selectedItem = iconURLs[1];
   expectEquals(oldName, nameEl.value);
 
   PageManager.closeOverlay();
 });
 
 GEN('#endif  // OS_CHROMEOS');