file_manager: Allow renaming of Drive files even when offline

chrome/browser/resources/file_manager/foreground/js/file_manager_commands.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.
 
 'use strict';
 
 /**
  * TODO(dzvorygin): Here we use this hack, since 'hidden' is standard
  * attribute and we can't use it's setter as usual.
  * @param {boolean} value New value of hidden property.
@@ skipping 515 matching lines @@
 
 /**
  * Initiates file renaming.
  * @type {Command}
  */
 CommandHandler.COMMANDS_['rename'] = {
   execute: function(event, fileManager) {
     fileManager.initiateRename();
   },
   canExecute: function(event, fileManager) {
+    var allowRenamingWhileOffline =
+        fileManager.directoryModel.getCurrentRootType() === RootType.DRIVE;
     var selection = fileManager.getSelection();
     event.canExecute =
         !fileManager.isRenamingInProgress() &&
-        !fileManager.isOnReadonlyDirectory() &&
+        (!fileManager.isOnReadonlyDirectory() || allowRenamingWhileOffline) &&
         selection &&
         selection.totalCount == 1;
   }
 };
 
 /**
  * Opens drive help.
  * @type {Command}
  */
 CommandHandler.COMMANDS_['volume-help'] = {
@@ skipping 295 matching lines @@
 /**
  * Reset the zoom factor.
  * @type {Command}
  */
 CommandHandler.COMMANDS_['zoom-reset'] = {
   execute: function(event, fileManager) {
     chrome.fileBrowserPrivate.zoom('reset');
   },
   canExecute: CommandUtil.canExecuteAlways
 };