Clone tokens when cloning ASTs for constants

pkg/analyzer/lib/src/generated/testing/ast_factory.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.testing.ast_factory;
 
 import 'package:analyzer/src/generated/utilities_dart.dart';
@@ skipping 345 matching lines @@
 
   static SwitchDefault switchDefault2(List<Statement> statements) => switchDefault(new List<Label>(), statements);
 
   static SwitchStatement switchStatement(Expression expression, List<SwitchMember> members) => new SwitchStatement(TokenFactory.tokenFromKeyword(Keyword.SWITCH), TokenFactory.tokenFromType(TokenType.OPEN_PAREN), expression, TokenFactory.tokenFromType(TokenType.CLOSE_PAREN), TokenFactory.tokenFromType(TokenType.OPEN_CURLY_BRACKET), list(members), TokenFactory.tokenFromType(TokenType.CLOSE_CURLY_BRACKET));
 
   static SymbolLiteral symbolLiteral(List<String> components) {
     List<Token> identifierList = new List<Token>();
     for (String component in components) {
       identifierList.add(TokenFactory.tokenFromTypeAndString(TokenType.IDENTIFIER, component));
     }
-    return new SymbolLiteral(TokenFactory.tokenFromType(TokenType.HASH), new List.from(identifierList));
+    return new SymbolLiteral(TokenFactory.tokenFromType(TokenType.HASH), identifierList);
   }
 
   static BlockFunctionBody syncBlockFunctionBody(List<Statement> statements) => new BlockFunctionBody(TokenFactory.tokenFromTypeAndString(TokenType.IDENTIFIER, "sync"), null, block(statements));
 
   static BlockFunctionBody syncGeneratorBlockFunctionBody(List<Statement> statements) => new BlockFunctionBody(TokenFactory.tokenFromTypeAndString(TokenType.IDENTIFIER, "sync"), TokenFactory.tokenFromType(TokenType.STAR), block(statements));
 
   static ThisExpression thisExpression() => new ThisExpression(TokenFactory.tokenFromKeyword(Keyword.THIS));
 
   static ThrowExpression throwExpression() => throwExpression2(null);
 
@@ skipping 69 matching lines @@
   static VariableDeclarationStatement variableDeclarationStatement2(Keyword keyword, List<VariableDeclaration> variables) => variableDeclarationStatement(keyword, null, variables);
 
   static WhileStatement whileStatement(Expression condition, Statement body) => new WhileStatement(TokenFactory.tokenFromKeyword(Keyword.WHILE), TokenFactory.tokenFromType(TokenType.OPEN_PAREN), condition, TokenFactory.tokenFromType(TokenType.CLOSE_PAREN), body);
 
   static WithClause withClause(List<TypeName> types) => new WithClause(TokenFactory.tokenFromKeyword(Keyword.WITH), list(types));
 
   static YieldStatement yieldEachStatement(Expression expression) => new YieldStatement(TokenFactory.tokenFromTypeAndString(TokenType.IDENTIFIER, "yield"), TokenFactory.tokenFromType(TokenType.STAR), expression, TokenFactory.tokenFromType(TokenType.SEMICOLON));
 
   static YieldStatement yieldStatement(Expression expression) => new YieldStatement(TokenFactory.tokenFromTypeAndString(TokenType.IDENTIFIER, "yield"), null, expression, TokenFactory.tokenFromType(TokenType.SEMICOLON));
 }