Implement constructor bodies and initializers in CPS->JS backend.

pkg/compiler/lib/src/tree_ir/optimization/statement_rewriter.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.
 
 part of tree_ir.optimization;
 
 /**
  * Performs the following transformations on the tree:
  * - Assignment propagation
  * - If-to-conditional conversion
@@ skipping 406 matching lines @@
 
   Expression visitGetField(GetField node) {
     node.object = visitExpression(node.object);
     return node;
   }
 
   Expression visitCreateBox(CreateBox node) {
     return node;
   }
 
-  Expression visitCreateClosureClass(CreateClosureClass node) {
+  Expression visitCreateInstance(CreateInstance node) {
     for (int i = node.arguments.length - 1; i >= 0; --i) {
       node.arguments[i] = visitExpression(node.arguments[i]);
     }
     return node;
   }
 
   /// If [s] and [t] are similar statements we extract their subexpressions
   /// and returns a new statement of the same type using expressions combined
   /// with the [combine] callback. For example:
   ///
@@ skipping 152 matching lines @@
   }
 
   Expression makeCondition(Expression e, bool polarity) {
     return polarity ? e : new Not(e);
   }
 
   Statement getBranch(If node, bool polarity) {
     return polarity ? node.thenStatement : node.elseStatement;
   }
 }