Remove repaint callbacks from Viewport.

ui/file_manager/gallery/js/slide_mode.js

Index: ui/file_manager/gallery/js/slide_mode.js
diff --git a/ui/file_manager/gallery/js/slide_mode.js b/ui/file_manager/gallery/js/slide_mode.js
index bdbe8a2b331b14cad15ff4c4d46c3fa16d0c721c..d0c04b662a8e3ba47aeb98a7d232c4a87d8585a9 100644
--- a/ui/file_manager/gallery/js/slide_mode.js
+++ b/ui/file_manager/gallery/js/slide_mode.js
@@ -82,7 +82,7 @@ SlideMode.prototype.getTitle = function() { return 'GALLERY_SLIDE'; };
  * @private
  */
 SlideMode.prototype.initListeners_ = function() {
-  window.addEventListener('resize', this.onResize_.bind(this), false);
+  window.addEventListener('resize', this.onResize_.bind(this));
 };
 
 /**
@@ -868,7 +868,8 @@ SlideMode.prototype.onKeyDown = function(event) {
  */
 SlideMode.prototype.onResize_ = function() {
   this.viewport_.sizeByFrameAndFit(this.container_);
-  this.viewport_.repaint();
+  this.viewport_.update();
+  this.editor_.getBuffer().draw();
 };
 
 /**