Remove the use of KeyEvent.keyIdentifier.

ui/file_manager/file_manager/foreground/js/naming_controller.js

Index: ui/file_manager/file_manager/foreground/js/naming_controller.js
diff --git a/ui/file_manager/file_manager/foreground/js/naming_controller.js b/ui/file_manager/file_manager/foreground/js/naming_controller.js
index eafae9e1d76cfaf6adc11400f6d6ae03246247e3..edcdcaa5e64053d88b8c00c0b7c41505b3873940 100644
--- a/ui/file_manager/file_manager/foreground/js/naming_controller.js
+++ b/ui/file_manager/file_manager/foreground/js/naming_controller.js
@@ -216,12 +216,12 @@ NamingController.prototype.onRenameInputKeyDown_ = function(event) {
     return;
 
   // Do not move selection or lead item in list during rename.
-  if (event.keyIdentifier == 'Up' || event.keyIdentifier == 'Down') {
+  if (event.key === 'ArrowUp' || event.key === 'ArrowDown') {
     event.stopPropagation();
   }
 
-  switch (util.getKeyModifiers(event) + event.keyIdentifier) {
-    case 'U+001B':  // Escape
+  switch (util.getKeyModifiers(event) + event.key) {
+    case 'Escape':
       this.cancelRename_();
       event.preventDefault();
       break;