dart2js cps: Fix codegen for yield.

pkg/compiler/lib/src/js_backend/codegen/codegen.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 code_generator;
 
 import 'glue.dart';
 
 import '../../closure.dart' show
     ClosureClassElement;
@@ skipping 877 matching lines @@
 
   @override
   void visitForeignStatement(tree_ir.ForeignStatement node) {
     accumulator.add(handleForeignCode(node));
   }
 
   @override
   void visitYield(tree_ir.Yield node) {
     js.Expression value = visitExpression(node.input);
     accumulator.add(new js.DartYield(value, node.hasStar));
+    visitStatement(node.next);
   }
 
   @override
   js.Expression visitApplyBuiltinOperator(tree_ir.ApplyBuiltinOperator node) {
     List<js.Expression> args = visitExpressionList(node.arguments);
     switch (node.operator) {
       case BuiltinOperator.NumAdd:
         return new js.Binary('+', args[0], args[1]);
       case BuiltinOperator.NumSubtract:
         return new js.Binary('-', args[0], args[1]);
@@ skipping 171 matching lines @@
   void registerDefaultParameterValues(ExecutableElement element) {
     if (element is! FunctionElement) return;
     FunctionElement function = element;
     if (function.isStatic) return; // Defaults are inlined at call sites.
     function.functionSignature.forEachOptionalParameter((param) {
       ConstantValue constant = glue.getDefaultParameterValue(param);
       registry.registerCompileTimeConstant(constant);
     });
   }
 }