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

chrome/common/extensions/api/developer_private.idl

 // 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.
 
 // developerPrivate API.
 // This is a private API exposing developing and debugging functionalities for
 // apps and extensions.
 namespace developerPrivate {
 
   // DEPRECATED: Prefer ExtensionType.
@@ skipping 168 matching lines @@
     CommandScope scope;
     boolean isExtensionAction;
   };
 
   dictionary DependentExtension {
     DOMString id;
     DOMString name;
   };
 
   dictionary ExtensionInfo {
-    boolean actionButtonHidden;
     DOMString? blacklistText;
     Command[] commands;
     ControlledInfo? controlledInfo;
     DependentExtension[] dependentExtensions;
     DOMString description;
     DisableReasons disableReasons;
     AccessModifier errorCollection;
     AccessModifier fileAccess;
     HomePage homePage;
     DOMString iconUrl;
@@ skipping 72 matching lines @@
     boolean? includeDisabled;
     boolean? includeTerminated;
   };
 
   dictionary ExtensionConfigurationUpdate {
     DOMString extensionId;
     boolean? fileAccess;
     boolean? incognitoAccess;
     boolean? errorCollection;
     boolean? runOnAllUrls;
-    boolean? showActionButton;
   };
 
   dictionary ProfileConfigurationUpdate {
     boolean? inDeveloperMode;
   };
 
   dictionary ExtensionCommandUpdate {
     DOMString extensionId;
     DOMString commandName;
     CommandScope? scope;
@@ skipping 337 matching lines @@
 
   interface Events {
     // Fired when a item state is changed.
     static void onItemStateChanged(EventData response);
 
     // Fired when the profile's state has changed.
     static void onProfileStateChanged(ProfileInfo info);
   };
 
 };