First cut of the updated Photo Editor UI

chrome/browser/resources/file_manager/js/image_editor/image_view.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.
 
 /**
  * The overlay displaying the image.
  * @param {HTMLElement} container The container element.
  * @param {Viewport} viewport The viewport.
  * @param {MetadataCache} metadataCache The metadataCache.
  */
@@ skipping 477 matching lines @@
   this.contentCache_.renameItem(this.contentID_, newUrl);
   this.screenCache_.renameItem(this.contentID_, newUrl);
   this.contentID_ = newUrl;
 };
 
 /**
  * Unload content.
  */
 ImageView.prototype.unload = function() {
   this.container_.textContent = '';
+  this.contentCanvas_ = null;
   this.screenImage_ = null;
   this.videoElement_ = null;
 };
 
 /**
  *
  * @param {HTMLCanvasElement|HTMLVideoElement} content The image element.
  * @param {boolean} opt_reuseScreenCanvas True if it is OK to reuse the screen
  *   resolution canvas.
  * @param {number} opt_width Image width.
@@ skipping 324 matching lines @@
     return;  // No need to rename.
 
   var pos = this.order_.indexOf(oldId);
   if (pos < 0)
     return;  // Not cached.
 
   this.order_[pos] = newId;
   this.map_[newId] = this.map_[oldId];
   delete this.map_[oldId];
 };