PDF: Use KeyboardEvent.code instead of keyCode.

chrome/browser/resources/pdf/elements/viewer-password-screen/viewer-password-screen.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.
 
 Polymer({
   is: 'viewer-password-screen',
 
   properties: {
     invalid: Boolean,
 
@@ skipping 16 matching lines @@
 
   deny: function() {
     this.$.password.disabled = false;
     this.$.submit.disabled = false;
     this.invalid = true;
     this.$.password.focus();
     this.$.password.select();
   },
 
   handleKey: function(e) {
-    if (e.keyCode == 13)
+    if (e.code == 'Enter')
       this.submit();
   },
 
   submit: function() {
     if (this.$.password.value.length == 0)
       return;
     this.$.password.disabled = true;
     this.$.submit.disabled = true;
     this.fire('password-submitted', {password: this.$.password.value});
   },
 
   activeChanged: function() {
     if (this.active) {
       this.$.dialog.open();
       this.$.password.focus();
     } else {
       this.$.dialog.close();
     }
   }
 });