dart2js cps: Use oneshot interceptors and 'instanceof' expressions.

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.
 
 library tree_ir.optimization.statement_rewriter;
 
 import 'optimization.dart' show Pass;
 import '../tree_ir_nodes.dart';
 import '../../io/source_information.dart';
 import '../../elements/elements.dart';
@@ skipping 485 matching lines @@
       // Impure expressions cannot be propagated across the method lookup,
       // because it throws when the receiver is null.
       inEmptyEnvironment(() {
         _rewriteList(node.arguments);
       });
       node.receiver = visitExpression(node.receiver);
     }
     return node;
   }
 
+  Expression visitOneShotInterceptor(OneShotInterceptor node) {
+    _rewriteList(node.arguments);
+    return node;
+  }
+
   Expression visitApplyBuiltinMethod(ApplyBuiltinMethod node) {
     if (node.receiverIsNotNull) {
       _rewriteList(node.arguments);
       node.receiver = visitExpression(node.receiver);
     } else {
       // Impure expressions cannot be propagated across the method lookup,
       // because it throws when the receiver is null.
       inEmptyEnvironment(() {
         _rewriteList(node.arguments);
       });
@@ skipping 769 matching lines @@
   VariableUseCallback callback;
 
   VariableUseVisitor(this.callback);
 
   visitVariableUse(VariableUse use) => callback(use);
 
   static void visit(Expression node, VariableUseCallback callback) {
     new VariableUseVisitor(callback).visitExpression(node);
   }
 }