Fixed slide show in Files.app's gallery.

chrome/browser/resources/file_manager/js/photo/slide_mode.js

Index: chrome/browser/resources/file_manager/js/photo/slide_mode.js
diff --git a/chrome/browser/resources/file_manager/js/photo/slide_mode.js b/chrome/browser/resources/file_manager/js/photo/slide_mode.js
index 4eb2a051c410098d80d2cda5821267991603a4b9..097e8f2905341ce8589378f2057bcce7006c5306 100644
--- a/chrome/browser/resources/file_manager/js/photo/slide_mode.js
+++ b/chrome/browser/resources/file_manager/js/photo/slide_mode.js
@@ -1052,7 +1052,7 @@ SlideMode.prototype.startSlideshow = function(opt_interval, opt_event) {
   this.fullscreenBeforeSlideshow_ = util.isFullScreen();
   if (!this.fullscreenBeforeSlideshow_) {
     // Wait until the zoom animation from the mosaic mode is done.
-    setTimeout(this.toggleFullscreen_.bind(this),
+    setTimeout(this.toggleFullScreen_.bind(this),
                ImageView.ZOOM_ANIMATION_DURATION);
     opt_interval = (opt_interval || SlideMode.SLIDESHOW_INTERVAL) +
         SlideMode.FULLSCREEN_TOGGLE_DELAY;