Remove unnecessary List creation

pkg/analyzer/test/generated/all_the_rest.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.all_the_rest_test;
 
 import 'dart:collection';
@@ skipping 10923 matching lines @@
   }
   /**
    * Set the tags to be expected when visiting
    *
    * @param expectedTags the expected tags
    */
   void expectTags(List<XmlValidator_Tag> expectedTags) {
     // Flatten the hierarchy into expected order in which the tags are visited
     List<XmlValidator_Tag> expected = new List<XmlValidator_Tag>();
     _expectTags(expected, expectedTags);
-    this._expectedTagsInOrderVisited = new List.from(expected);
+    this._expectedTagsInOrderVisited = expected;
   }
   @override
   Object visitHtmlUnit(ht.HtmlUnit node) {
     if (node.parent != null) {
       _errors.add("HtmlUnit should not have a parent");
     }
     if (node.endToken.type != ht.TokenType.EOF) {
       _errors.add("HtmlUnit end token should be of type EOF");
     }
     _validateNode(node);
@@ skipping 220 matching lines @@
     } else {
       JUnitTestCase.assertNotNullMsg("script ${scriptIndex}", scriptSource);
       String actualExternalScriptName = scriptSource.shortName;
       JUnitTestCase.assertEqualsMsg(
           "script ${scriptIndex}",
           _expectedExternalScriptName,
           actualExternalScriptName);
     }
   }
 }