Generate tear-off closures dynamically.

dart/sdk/lib/_internal/compiler/implementation/js/nodes.dart

 // Copyright (c) 2012, 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.
 
 part of js;
 
 abstract class NodeVisitor<T> {
   T visitProgram(Program node);
 
   T visitBlock(Block node);
@@ skipping 435 matching lines @@
 
   accept(NodeVisitor visitor) => visitor.visitLiteralStatement(this);
   void visitChildren(NodeVisitor visitor) { }
 }
 
 abstract class Expression extends Node {
   int get precedenceLevel;
 
   Call callWith(List<Expression> arguments) => new Call(this, arguments);
 
-  New newWith(List<Expression> arguments) => new New(this, arguments);
-
   PropertyAccess operator [](expression) {
     if (expression is Expression) {
       return new PropertyAccess(this, expression);
     } else if (expression is int) {
       return new PropertyAccess.indexed(this, expression);
     } else if (expression is String) {
       return new PropertyAccess.field(this, expression);
     } else {
       throw new ArgumentError('Expected an int, String, or Expression');
     }
@@ skipping 538 matching lines @@
  */
 class Comment extends Statement {
   final String comment;
 
   Comment(this.comment);
 
   accept(NodeVisitor visitor) => visitor.visitComment(this);
 
   void visitChildren(NodeVisitor visitor) {}
 }