Files App: Update the context menu when installed app is changed.

ui/file_manager/file_manager/foreground/js/task_controller.js

 // Copyright 2014 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.
 
 /**
  * @param {DialogType} dialogType
  * @param {!VolumeManagerWrapper} volumeManager
  * @param {!FileManagerUI} ui
  * @param {!MetadataModel} metadataModel
  * @param {!DirectoryModel} directoryModel
@@ skipping 79 matching lines @@
    */
   this.tasks_ = null;
 
   ui.taskMenuButton.addEventListener(
       'select', this.onTaskItemClicked_.bind(this));
   this.selectionHandler_.addEventListener(
       FileSelectionHandler.EventType.CHANGE,
       this.onSelectionChanged_.bind(this));
   this.selectionHandler_.addEventListener(
       FileSelectionHandler.EventType.CHANGE_THROTTLED,
-      this.onSelectionChangeThrottled_.bind(this));
+      this.updateTasks_.bind(this));
+  chrome.fileManagerPrivate.onAppsUpdated.addListener(
+      this.updateTasks_.bind(this));
 }
 
 /**
  * Cached the temporary disabled task item. Used inside
  * FileSelectionHandler.createTemporaryDisabledTaskItem_().
  * @type {Object}
  * @private
  */
 TaskController.cachedDisabledTaskItem_ = null;
 
@@ skipping 159 matching lines @@
     // overridden in this.updateFileSelectionAsync().
     this.updateContextMenuTaskItems_(
         [TaskController.createTemporaryDisabledTaskItem_()]);
   } else {
     // Update context menu.
     this.updateContextMenuTaskItems_([]);
   }
 };
 
 /**
- * Handles change of selection asynchronously and updates context menu.
+ * Updates available tasks opened from context menu or the open button.
  * @private
  */
-TaskController.prototype.onSelectionChangeThrottled_ = function() {
+TaskController.prototype.updateTasks_ = function() {
   var selection = this.selectionHandler_.selection;
   if (this.dialogType_ === DialogType.FULL_PAGE &&
       (selection.directoryCount > 0 || selection.fileCount > 0)) {
     this.getFileTasks()
         .then(function(tasks) {
           tasks.display(this.ui_.taskMenuButton);
           this.updateContextMenuTaskItems_(tasks.getTaskItems());
         }.bind(this))
         .catch(function(error) {
           if (error)
@@ skipping 93 matching lines @@
   this.metadataModel_.get([entry], ['contentMimeType']).then(
       function(props) {
         FileTasks.create(
             this.volumeManager_, this.metadataModel_, this.directoryModel_,
             this.ui_, [entry], [props[0].contentMimeType || null])
             .then(function(tasks) {
               tasks.executeDefault();
             });
       }.bind(this));
 };