Refactor the Photo Editor to enable new feature work

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.
 
 /**
  * This object encapsulates everything related to tasks execution.
  * @param {FileManager} fileManager FileManager instance.
  * @param {Array.<string>} urls List of file urls.
  */
 function FileTasks(fileManager, urls) {
@@ skipping 37 matching lines @@
   this.pendingInvocations_ = [];
 };
 
 /**
  * Processes internal tasks.
  * @param {Array.<Object>} tasks The tasks.
  * @private
  */
 FileTasks.prototype.processTasks_ = function(tasks) {
   this.tasks_ = [];
-  var id = this.fileManager_.getExtensionId();
+  var id = util.getExtensionId();
   var is_on_drive = false;
   for (var index = 0; index < this.urls_.length; ++index) {
     if (FileType.isOnGDrive(this.urls_[index])) {
       is_on_drive = true;
       break;
     }
   }
 
   for (var i = 0; i < tasks.length; i++) {
     var task = tasks[i];
@@ skipping 86 matching lines @@
  * @param {string} taskId Task identifier.
  * @param {Array.<string>=} opt_urls Urls to execute on instead of |this.urls_|.
  * @private
  */
 FileTasks.prototype.execute_ = function(taskId, opt_urls) {
   var urls = opt_urls || this.urls_;
   this.checkAvailability_(function() {
     chrome.fileBrowserPrivate.executeTask(taskId, urls);
 
     var task_parts = taskId.split('|');
-    if (task_parts[0] == this.fileManager_.getExtensionId()) {
+    if (task_parts[0] == util.getExtensionId()) {
       // For internal tasks we do not listen to the event to avoid
       // handling the same task instance from multiple tabs.
       // So, we manually execute the task.
       this.executeInternalTask_(task_parts[1], urls);
     }
   }.bind(this));
 };
 
 /**
  * Checks whether the remote files are available right now.
@@ skipping 282 matching lines @@
   this.fileManager_.setDefaultActionMenuItem(this.defaultTask_);
 };
 
 /**
  * Returns a list of external tasks (i.e. not defined in file manager).
  * @param {function(Array.<Object>)} callback The callback.
  * @private
  */
 FileTasks.prototype.getExternals_ = function(callback) {
   var externals = [];
-  var id = this.fileManager_.getExtensionId();
+  var id = util.getExtensionId();
   for (var index = 0; index < this.tasks_.length; index++) {
     var task = this.tasks_[index];
     var task_parts = task.taskId.split('|');
     if (task_parts[0] != id) {
       // Add callback, so gallery can execute the task.
       task.execute = this.execute_.bind(this, task.taskId);
       externals.push(task);
     }
   }
   callback(externals);
@@ skipping 33 matching lines @@
     return this;
   };
 };
 
 FileTasks.decorate('display');
 FileTasks.decorate('updateMenuItem');
 FileTasks.decorate('execute');
 FileTasks.decorate('executeDefault');
 FileTasks.decorate('getExternals');