Add Timeout.none.

test/runner/parse_metadata_test.dart

Index: test/runner/parse_metadata_test.dart
diff --git a/test/runner/parse_metadata_test.dart b/test/runner/parse_metadata_test.dart
index 6c45253b7662192acefd5298e42ec2297939c924..5e682d4e5d76dff1665e9ece1082497aa98aa0a9 100644
--- a/test/runner/parse_metadata_test.dart
+++ b/test/runner/parse_metadata_test.dart
@@ -144,6 +144,16 @@ library foo;
       expect(metadata.timeout.scaleFactor, equals(0.5));
     });
 
+    test("parses a valid Timeout.none annotation", () {
+      new File(_path).writeAsStringSync("""
+@Timeout.none
+
+library foo;
+""");
+      var metadata = parseMetadata(_path);
+      expect(metadata.timeout, same(Timeout.none));
+    });
+
     test("ignores a constructor named Timeout", () {
       new File(_path).writeAsStringSync("@foo.Timeout('foo')\nlibrary foo;");
       var metadata = parseMetadata(_path);
@@ -166,6 +176,11 @@ library foo;
         expect(() => parseMetadata(_path), throwsFormatException);
       });
 
+      test("an argument list for Timeout.none", () {
+        new File(_path).writeAsStringSync("@Timeout.none()\nlibrary foo;");
+        expect(() => parseMetadata(_path), throwsFormatException);
+      });
+
       test("a named argument", () {
         new File(_path).writeAsStringSync(
             "@Timeout(duration: const Duration(seconds: 1))\nlibrary foo;");