Files: Add a shortcut Alt-E to open gear menu.

ui/file_manager/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.
 
 /**
  * Sets 'hidden' property of a cr.ui.Command instance and dispatches
  * 'hiddenChange' event manually so that associated cr.ui.MenuItem can handle
  * the event.
  * TODO(fukino): Remove this workaround when crbug.com/481941 is fixed.
  *
@@ skipping 1445 matching lines @@
             fileManager.providersModel.requestMount(assert(itemId));
         });
   },
   canExecute: function(event, fileManager) {
     event.canExecute = fileManager.dialogType === DialogType.FULL_PAGE;
     event.command.setHidden(!event.canExecute);
   }
 });
 
 /**
+ * Opens the gear menu on Alt-E.
+ * @type {Command}
+ */
+CommandHandler.COMMANDS_['open-gear-menu'] = /** @type {Command} */ ({
+  /**
+   * @param {!Event} event Command event.
+   * @param {!FileManager} fileManager FileManager to use.
+   */
+  execute: function(event, fileManager) {
+    fileManager.ui.gearButton.showMenu(true);
+  },
+  /**
+   * @param {!Event} event Command event.
+   * @param {!FileManager} fileManager FileManager to use.
+   */
+  canExecute: function(event, fileManager) {

[hirono, 2016/02/23 08:41:11]

nit: Maybe CommandUtil.canExecuteAlways is enough?

[fukino, 2016/02/23 08:50:33]

Yes, canExecuteAlways works here.
Thank you for pointing this out! Done.

+    event.canExecute = !fileManager.ui.gearButton.isMenuShown();
+  }
+});
+
+/**
  * Configures the currently selected volume.
  */
 CommandHandler.COMMANDS_['configure'] = /** @type {Command} */ ({
   /**
    * @param {!Event} event Command event.
    * @param {!FileManager} fileManager FileManager to use.
    */
   execute: function(event, fileManager) {
     var volumeInfo =
         CommandUtil.getElementVolumeInfo(event.target, fileManager) ||
@@ skipping 24 matching lines @@
   },
   canExecute: function(event, fileManager) {
     var currentDirEntry = fileManager.directoryModel.getCurrentDirEntry();
     var volumeInfo = currentDirEntry &&
         fileManager.volumeManager.getVolumeInfo(currentDirEntry);
     event.canExecute = volumeInfo && !volumeInfo.watchable;
     event.command.setHidden(!event.canExecute ||
         fileManager.directoryModel.getFileListSelection().getCheckSelectMode());
   }
 });