Issue 1287. Allow to invoke function literal.

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

Index: compiler/java/com/google/dart/compiler/ast/DartReturnBlock.java
diff --git a/compiler/java/com/google/dart/compiler/ast/DartReturnBlock.java b/compiler/java/com/google/dart/compiler/ast/DartReturnBlock.java
new file mode 100644
index 0000000000000000000000000000000000000000..0c6dbed811cfe07358ac644a4dfbc4de0f36a743
--- /dev/null
+++ b/compiler/java/com/google/dart/compiler/ast/DartReturnBlock.java
@@ -0,0 +1,15 @@
+// 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.
+package com.google.dart.compiler.ast;
+
+import com.google.common.collect.Lists;
+
+/**
+ * Represents a Dart block containing a single return statement.
+ */
+public class DartReturnBlock extends DartBlock {
+  public DartReturnBlock(DartExpression returnVal) {
+    super(Lists.<DartStatement>newArrayList(new DartReturnStatement(returnVal)));
+  }
+}