[Cleanup] Files.app: Misc style fixes in Javascript code.

chrome/browser/resources/file_manager/js/photo/slide_mode.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.
 
 /**
  * Slide mode displays a single image and has a set of controls to navigate
  * between the images and to edit an image.
  *
  * TODO(kaznacheev): Introduce a parameter object.
  *
@@ skipping 1037 matching lines @@
           SlideMode.FULLSCREEN_TOGGLE_DELAY;
     }
     this.resumeSlideshow_(opt_interval);
   }.bind(this));
 };
 
 /**
  * Stop the slideshow.
  * @param {Event} opt_event Event.
  * @private
-   */
+ */
 SlideMode.prototype.stopSlideshow_ = function(opt_event) {
   if (!this.isSlideshowOn_())
     return;
 
   if (opt_event)  // Caused by user action, notify the Gallery.
     cr.dispatchSimpleEvent(this, 'useraction');
 
   this.pauseSlideshow_();
   this.container_.removeAttribute('slideshow');
   Gallery.getFileBrowserPrivate().isFullscreen(function(fullscreen) {
@@ skipping 194 matching lines @@
       done = true;
     }
   }.bind(this);
 };
 
 /**
  * If the user touched the image and moved the finger more than SWIPE_THRESHOLD
  * horizontally it's considered as a swipe gesture (change the current image).
  */
 SwipeOverlay.SWIPE_THRESHOLD = 100;