Files.app: fix some closure compilation issues to unblock new compiler roll.

ui/file_manager/gallery/js/image_editor/image_editor.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.
 
 /**
  * ImageEditor is the top level object that holds together and connects
  * everything needed for image editing.
  *
  * @param {!Viewport} viewport The viewport.
  * @param {!ImageView} imageView The ImageView containing the images to edit.
  * @param {!ImageEditor.Prompt} prompt Prompt instance.
  * @param {!Object} DOMContainers Various DOM containers required for the
  *     editor.
  * @param {!Array.<!ImageEditor.Mode>} modes Available editor modes.
- * @param {function(string, ...[string])} displayStringFunction String
+ * @param {function(string, ...string)} displayStringFunction String
  *     formatting function.
  * @param {function()} onToolsVisibilityChanged Callback to be called, when
  *     some of the UI elements have been dimmed or revealed.
  * @constructor
  * @struct
  */
 function ImageEditor(
     viewport, imageView, prompt, DOMContainers, modes, displayStringFunction,
     onToolsVisibilityChanged) {
   this.rootContainer_ = DOMContainers.root;
@@ skipping 1167 matching lines @@
 ImageEditor.Toolbar.prototype.show = function(on) {
   if (!this.wrapper_.firstChild)
     return;  // Do not show empty toolbar;
 
   this.wrapper_.hidden = !on;
 };
 
 /** A prompt panel for the editor.
  *
  * @param {!HTMLElement} container Container element.
- * @param {function(string, ...[string])} displayStringFunction A formatting
+ * @param {function(string, ...string)} displayStringFunction A formatting
  *     function.
  * @constructor
  * @struct
  */
 ImageEditor.Prompt = function(container, displayStringFunction) {
   this.container_ = container;
   this.displayStringFunction_ = displayStringFunction;
 
   /**
    * @type {HTMLDivElement}
@@ skipping 123 matching lines @@
 
 /**
  * Hide the prompt.
  */
 ImageEditor.Prompt.prototype.hide = function() {
   if (!this.prompt_) return;
   this.prompt_.setAttribute('state', 'fadeout');
   // Allow some time for the animation to play out.
   this.setTimer(this.reset.bind(this), 500);
 };