Refactor the various ways to control what users can do to extensions.

chrome/browser/extensions/extension_management_api_constants.cc

 // 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 "chrome/browser/extensions/extension_management_api_constants.h"
 
 namespace extension_management_api_constants {
 
 const char kAppLaunchUrlKey[] = "appLaunchUrl";
 const char kDisabledReasonKey[] = "disabledReason";
 const char kHostPermissionsKey[] = "hostPermissions";
 const char kIconsKey[] = "icons";
 const char kIsAppKey[] = "isApp";
+const char kMayDisableKey[] = "mayDisable";
 const char kPermissionsKey[] = "permissions";
 const char kShowConfirmDialogKey[] = "showConfirmDialog";
 const char kSizeKey[] = "size";
 const char kUpdateUrlKey[] = "updateUrl";
 const char kUrlKey[] = "url";
 
 const char kDisabledReasonPermissionsIncrease[] = "permissions_increase";
 const char kDisabledReasonUnknown[] = "unknown";
 
 const char kExtensionCreateError[] =
     "Failed to create extension from manifest.";
 const char kGestureNeededForEscalationError[] =
     "Re-enabling an extension disabled due to permissions increase "
     "requires a user gesture";
 const char kManifestParseError[] = "Failed to parse manifest.";
 const char kNoExtensionError[] = "Failed to find extension with id *";
 const char kNotAnAppError[] = "Extension * is not an App";
+const char kUserCantModifyError[] = "Extension * cannot be modified by user";
 const char kUninstallCanceledError[] = "Extension * uninstall canceled by user";
-const char kUserCantDisableError[] = "Extension * can not be disabled by user";
 const char kUserDidNotReEnableError[] =
     "The user did not accept the re-enable dialog";
 
 }  // namespace extension_management_api_constants