Remove internal handlers from the Files.app's UI.

chrome/browser/resources/file_manager/js/file_tasks.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';
 
 /**
  * This object encapsulates everything related to tasks execution.
  *
  * @param {FileManager} fileManager FileManager instance.
@@ skipping 119 matching lines @@
   var isOnDrive = false;
   for (var index = 0; index < this.urls_.length; ++index) {
     if (FileType.isOnDrive(this.urls_[index])) {
       isOnDrive = true;
       break;
     }
   }
 
   for (var i = 0; i < tasks.length; i++) {
     var task = tasks[i];
+    var taskParts = task.taskId.split('|');
 
     // Skip Drive App if the file is not on Drive.
     if (!isOnDrive && task.driveApp)
       continue;
 
+    // Skip internal Files.app's handlers.
+    if (taskParts[0] == id && (taskParts[2] == 'auto-open' ||
+        taskParts[2] == 'select' || taskParts[2] == 'open')) {
+      continue;
+    }
+
     // Tweak images, titles of internal tasks.
-    var taskParts = task.taskId.split('|');
     if (taskParts[0] == id && taskParts[1] == 'file') {
       if (taskParts[2] == 'play') {
         // TODO(serya): This hack needed until task.iconUrl is working
         //             (see GetFileTasksFileBrowserFunction::RunImpl).
         task.iconType = 'audio';
         task.title = loadTimeData.getString('ACTION_LISTEN');
       } else if (taskParts[2] == 'mount-archive') {
         task.iconType = 'archive';
         task.title = loadTimeData.getString('MOUNT_ARCHIVE');
       } else if (taskParts[2] == 'gallery') {
@@ skipping 535 matching lines @@
       items, defaultIdx,
       function(item) {
         onSuccess(item.task);
       });
 };
 
 FileTasks.decorate('display');
 FileTasks.decorate('updateMenuItem');
 FileTasks.decorate('execute');
 FileTasks.decorate('executeDefault');