Remove repaint callbacks from Viewport.

ui/file_manager/gallery/js/image_editor/viewport.js

Index: ui/file_manager/gallery/js/image_editor/viewport.js
diff --git a/ui/file_manager/gallery/js/image_editor/viewport.js b/ui/file_manager/gallery/js/image_editor/viewport.js
index 1c41bdc082ee4e94399ff0906bd01efa56571f5f..4e5adfc96b63da8e5c911a5961049edf2eae03b1 100644
--- a/ui/file_manager/gallery/js/image_editor/viewport.js
+++ b/ui/file_manager/gallery/js/image_editor/viewport.js
@@ -35,7 +35,6 @@ function Viewport() {
 
   this.generation_ = 0;
 
-  this.repaintCallbacks_ = [];
   this.update();
 }
 
@@ -180,15 +179,10 @@ Viewport.prototype.createOffsetSetter = function(
       self.setOffset(
           originalOffsetX + (x - originalX) / scale,
           originalOffsetY + (y - originalY) / scale);
-      self.repaint();
     }
   };
 };
 
-/*
- * Access to the current viewport state.
- */
-
 /**
  * @return {Rect} The image bounds in image coordinates.
  */
@@ -220,7 +214,7 @@ Viewport.prototype.getScreenClipped = function() {
 Viewport.prototype.getCacheGeneration = function() { return this.generation_; };
 
 /**
- * Called on event view port state change (even if repaint has not been called).
+ * Called on event view port state change.
  */
 Viewport.prototype.invalidateCaches = function() { this.generation_++; };
 
@@ -231,10 +225,6 @@ Viewport.prototype.getImageBoundsOnScreen = function() {
   return this.imageOnScreen_;
 };
 
-/*
- * Conversion between the screen and image coordinate spaces.
- */
-
 /**
  * @param {number} size Size in screen coordinates.
  * @return {number} Size in image coordinates.
@@ -424,22 +414,6 @@ Viewport.prototype.update = function() {
 };
 
 /**
- * @param {function} callback Repaint callback.
- */
-Viewport.prototype.addRepaintCallback = function(callback) {
-  this.repaintCallbacks_.push(callback);
-};
-
-/**
- * Repaint all clients.
- */
-Viewport.prototype.repaint = function() {
-  this.update();
-  for (var i = 0; i != this.repaintCallbacks_.length; i++)
-    this.repaintCallbacks_[i]();
-};
-
-/**
  * Obtains CSS transformation for the screen image.
  * @return {string} Transformation description.
  */