[DevTools] Fix more frontend compiler errors

third_party/WebKit/Source/devtools/front_end/externs.js

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 676 matching lines @@
     /** @type {(!Array.<!ESTree.Node>|undefined)} */
     this.declarations;
     /** @type {(!Array.<!ESTree.Node>|undefined)} */
     this.properties;
     /** @type {(!ESTree.Node|undefined)} */
     this.init;
     /** @type {(!Array.<!ESTree.Node>|undefined)} */
     this.params;
     /** @type {(string|undefined)} */
     this.name;
-    /** @type {(!Array.<!ESTree.Node>|undefined)} */
+    /** @type {(?ESTree.Node|undefined)} */
     this.id;
 }
 
 /**
  * @extends {ESTree.Node}
  * @constructor
  */
 ESTree.TemplateLiteralNode = function()
 {
     /** @type {!Array.<!ESTree.Node>} */
     this.quasis;
     /** @type {!Array.<!ESTree.Node>} */
     this.expressions;
 }