Split serialization tests further

tests/compiler/dart2js/serialization/compilation_1_test.dart

Index: tests/compiler/dart2js/serialization/compilation_1_test.dart
diff --git a/tests/compiler/dart2js/serialization/compilation1_test.dart b/tests/compiler/dart2js/serialization/compilation_1_test.dart
similarity index 68%
copy from tests/compiler/dart2js/serialization/compilation1_test.dart
copy to tests/compiler/dart2js/serialization/compilation_1_test.dart
index e3f61762e59f4417ff320f90e56d1a64d5f82575..46abde0f1b3e8fa10d0d88f4bd21fa47903b3c5e 100644
--- a/tests/compiler/dart2js/serialization/compilation1_test.dart
+++ b/tests/compiler/dart2js/serialization/compilation_1_test.dart
@@ -2,11 +2,12 @@
 // 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 dart2js.serialization.compilation1_test;
+library dart2js.serialization.compilation_1_test;
 
 import 'compilation_test_helper.dart' as test;
 import 'test_data.dart';
+import 'test_helper.dart';
 
 main() {
-  test.main(['1', '${TESTS.length ~/ 4}']);
+  test.main(testSegment(-1, test.SPLIT_COUNT, test.SKIP_COUNT));
 }