Small fixes to top level type inference.

pkg/front_end/testcases/inference_new/void_return_type_subtypes_dynamic.dart

Index: pkg/front_end/testcases/inference_new/void_return_type_subtypes_dynamic.dart
diff --git a/pkg/front_end/testcases/inference_new/void_return_type_subtypes_dynamic.dart b/pkg/front_end/testcases/inference_new/void_return_type_subtypes_dynamic.dart
new file mode 100644
index 0000000000000000000000000000000000000000..b5570fa4a2d3338f232e70ec84a1dcedfb5263a7
--- /dev/null
+++ b/pkg/front_end/testcases/inference_new/void_return_type_subtypes_dynamic.dart
@@ -0,0 +1,22 @@
+// Copyright (c) 2017, 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.
+
+/*@testedFeatures=inference*/
+library test;
+
+T run<T>(T f()) {
+  print("running");
+  var /*@type=run::T*/ t = f();
+  print("done running");
+  return t;
+}
+
+void printRunning() {
+  print("running");
+}
+
+var /*@topType=void*/ y = /*info:USE_OF_VOID_RESULT, error:TOP_LEVEL_TYPE_ARGUMENTS*/ /*@typeArgs=void*/ run(
+    printRunning);
+
+main() {}