Settings: Make 'edit' button in autofill setting not mouse-focusable.

chrome/browser/resources/options/autofill_options_list.js

 // Copyright (c) 2012 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.autofillOptions', function() {
   /** @const */ var DeletableItem = options.DeletableItem;
   /** @const */ var DeletableItemList = options.DeletableItemList;
   /** @const */ var InlineEditableItem = options.InlineEditableItem;
   /** @const */ var InlineEditableItemList = options.InlineEditableItemList;
 
   function AutofillEditProfileButton(guid, edit) {
     var editButtonEl = document.createElement('button');
     editButtonEl.className = 'list-inline-button custom-appearance';
     editButtonEl.textContent =
         loadTimeData.getString('autofillEditProfileButton');
     editButtonEl.onclick = function(e) { edit(guid); };
 
-    // Don't select the row when clicking the button.
     editButtonEl.onmousedown = function(e) {
+      // Don't select the row when clicking the button.
       e.stopPropagation();
+      // Don't focus on the button when clicking it.
+      e.preventDefault();
     };
 
     return editButtonEl;
   }
 
   /**
    * Creates a new address list item.
    * @param {Array} entry An array of the form [guid, label].
    * @constructor
    * @extends {options.DeletableItem}
@@ skipping 466 matching lines @@
     CreditCardListItem: CreditCardListItem,
     ValuesListItem: ValuesListItem,
     NameListItem: NameListItem,
     AutofillAddressList: AutofillAddressList,
     AutofillCreditCardList: AutofillCreditCardList,
     AutofillValuesList: AutofillValuesList,
     AutofillNameValuesList: AutofillNameValuesList,
     AutofillPhoneValuesList: AutofillPhoneValuesList,
   };
 });