Remove repaint callbacks from Viewport.

ui/file_manager/gallery/js/image_editor/image_buffer.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.
 
 'use strict';
 
 /**
  * A stack of overlays that display itself and handle mouse events.
  * TODO(kaznacheev) Consider disbanding this class and moving
  * the functionality to individual objects that display anything or handle
@@ skipping 115 matching lines @@
  * ImageBuffer.Overlay is a pluggable extension that modifies the outlook
  * and the behavior of the ImageBuffer instance.
  * @class
  */
 ImageBuffer.Overlay = function() {};
 
 /**
  * TODO(JSDOC).
  * @return {number}  // TODO(JSDOC).
  */
-ImageBuffer.Overlay.prototype.getZIndex = function() { return 0 };
+ImageBuffer.Overlay.prototype.getZIndex = function() { return 0; };
 
 /**
  * TODO(JSDOC).
  */
 ImageBuffer.Overlay.prototype.draw = function() {};
 
 /**
  * TODO(JSDOC).
  * @param {number} x X coordinate for cursor.
  * @param {number} y Y coordinate for cursor.
@@ skipping 28 matching lines @@
 
 /**
  * TODO(JSDOC).
  * @param {number} x  // TODO(JSDOC).
  * @param {number} y  // TODO(JSDOC).
  * @return {ImageBuffer.DoubleTapAction}  // TODO(JSDOC).
  */
 ImageBuffer.Overlay.prototype.getDoubleTapAction = function(x, y) {
   return ImageBuffer.DoubleTapAction.NOTHING;
 };