Files.app: Disables browser shortcut keys.

chrome/browser/resources/file_manager/js/util.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.
 
 /**
  * Namespace for utility functions.
  */
 var util = {};
 
 /**
@@ skipping 1229 matching lines @@
  *     suffix like "x86-mario-something".
  * @return {boolean} True if the board of the device matches the given prefix.
  */
 util.boardIs = function(boardPrefix) {
   // The board name should be lower-cased, but making it case-insensitive for
   // backward compatibility just in case.
   var board = str('CHROMEOS_RELEASE_BOARD');
   var pattern = new RegExp('^' + boardPrefix, 'i');
   return board.match(pattern) != null;
 };
+
+/**
+ * Disabled browser shortcus key events on the given document.
+ * @param {Element} element Element to be disabled browser shortcut keys on.
+ */
+util.disableBrowserShortcutKeys = function(element) {
+  element.addEventListener('keydown', function(e) {
+    switch (util.getKeyModifiers(e) + e.keyCode) {
+      case 'Ctrl-79':  // Disable native Ctrl-O (open file).
+      case 'Ctrl-83':  // Disable native Ctrl-S (save as).
+      case 'Ctrl-85':  // Disable native Ctrl-U (view source).
+        e.preventDefault();
+    }
+  });
+};