Disabling right-click menu in Chrome OS Photo Editor and Media Player

chrome/browser/resources/file_manager/js/image_editor/gallery.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.
 
 /*
  * Base class that Ribbon uses to display photos.
  */
 
 function RibbonClient() {}
 
@@ skipping 52 matching lines @@
   new ImageEditor.Mode.OneClick('rotate_left', new Command.Rotate(-1)),
   new ImageEditor.Mode.OneClick('rotate_right', new Command.Rotate(1))
 ];
 
 Gallery.FADE_TIMEOUT = 3000;
 Gallery.FIRST_FADE_TIMEOUT = 1000;
 
 Gallery.prototype.initDom_ = function(shareActions) {
   var doc = this.document_;
 
+  doc.oncontextmenu = function(e) { e.preventDefault(); };
+
   // Clean up after the previous instance of Gallery.
   this.container_.removeAttribute('editing');
   this.container_.removeAttribute('tools');
 
   // The removeEventListener calls below are required to prevent memory leaks in
   // gallery_demo.html where the Gallery is re-created in the same iframe.
   // It is safe to remove these calls once gallery_demo.html is retired.
   if (window.galleryKeyDown) {
     doc.body.removeEventListener('keydown', window.galleryKeyDown);
   }
@@ skipping 1174 matching lines @@
 ShareMode.prototype.setUp = function() {
   ImageEditor.Mode.prototype.setUp.apply(this, arguments);
   ImageUtil.setAttribute(this.menu_, 'hidden', false);
   ImageUtil.setAttribute(this.button_, 'pressed', false);
 };
 
 ShareMode.prototype.cleanUpUI = function() {
   ImageEditor.Mode.prototype.cleanUpUI.apply(this, arguments);
   ImageUtil.setAttribute(this.menu_, 'hidden', true);
 };