[Extensions] Remove "show button" UI from chrome://extensions

chrome/browser/resources/extensions/extension_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.
 
 // <include src="extension_error.js">
 
 cr.define('extensions', function() {
   'use strict';
 
   var ExtensionType = chrome.developerPrivate.ExtensionType;
@@ skipping 463 matching lines @@
       wrapper.setupColumn('suspiciousLearnMore',
                           '.suspicious-install-message .learn-more-link');
 
       // The path, if provided by unpacked extension.
       wrapper.setupColumn('loadPath', '.load-path a:first-of-type', 'click',
                           function(e) {
         chrome.developerPrivate.showPath(extension.id);
         e.preventDefault();
       });
 
-      // The 'Show Browser Action' button.
-      wrapper.setupColumn('showButton', '.show-button', 'click', function(e) {
-        chrome.developerPrivate.updateExtensionConfiguration({
-          extensionId: extension.id,
-          showActionButton: true
-        });
-      });
-
       // The 'allow in incognito' checkbox.
       wrapper.setupColumn('incognito', '.incognito-control input', 'change',
                           function(e) {
         var butterBar = wrapper.querySelector('.butter-bar');
         var checked = e.target.checked;
         butterBar.hidden = !checked ||
             extension.type == ExtensionType.HOSTED_APP;
         chrome.developerPrivate.updateExtensionConfiguration({
           extensionId: extension.id,
           incognitoAccess: e.target.checked
@@ skipping 122 matching lines @@
 
       var item = wrapper.querySelector('.extension-list-item');
       item.style.backgroundImage = 'url(' + extension.iconUrl + ')';
 
       this.setText_(wrapper, '.extension-title', extension.name);
       this.setText_(wrapper, '.extension-version', extension.version);
       this.setText_(wrapper, '.location-text', extension.locationText || '');
       this.setText_(wrapper, '.blacklist-text', extension.blacklistText || '');
       this.setText_(wrapper, '.extension-description', extension.description);
 
-      // The 'Show Browser Action' button.
-      this.updateVisibility_(wrapper, '.show-button',
-                             isActive && extension.actionButtonHidden);
-
       // The 'allow in incognito' checkbox.
       this.updateVisibility_(wrapper, '.incognito-control',
                              isActive && this.incognitoAvailable_,
                              function(item) {
         var incognito = item.querySelector('input');
         incognito.disabled = !extension.incognitoAccess.isEnabled;
         incognito.checked = extension.incognitoAccess.isActive;
       });
       var showButterBar = isActive &&
             extension.incognitoAccess.isActive &&
@@ skipping 419 matching lines @@
         this.createWrapper_(extension, nextExt ? $(nextExt.id) : null);
       }
     }
   };
 
   return {
     ExtensionList: ExtensionList,
     ExtensionListDelegate: ExtensionListDelegate
   };
 });