Use NodeList where possible.

compiler/java/com/google/dart/compiler/ast/DartArrayLiteral.java

 // Copyright (c) 2011, 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.
 
 package com.google.dart.compiler.ast;
 
 import java.util.List;
 
 /**
  * Represents a Dart array literal value.
  */
 public class DartArrayLiteral extends DartTypedLiteral {
 
-  private final List<DartExpression> expressions;
+  private final NodeList<DartExpression> expressions = NodeList.create(this);
 
   public DartArrayLiteral(boolean isConst, List<DartTypeNode> typeArguments,
                           List<DartExpression> expressions) {
     super(isConst, typeArguments);
-    this.expressions = becomeParentOf(expressions);
+    this.expressions.addAll(expressions);
   }
 
   public List<DartExpression> getExpressions() {
     return expressions;
   }
 
   @Override
   public void visitChildren(ASTVisitor<?> visitor) {
     super.visitChildren(visitor);
-    visitor.visit(expressions);
+    expressions.accept(visitor);
   }
 
   @Override
   public <R> R accept(ASTVisitor<R> visitor) {
     return visitor.visitArrayLiteral(this);
   }
 }