Split js_backend_cps_ir tests into multiple test units.

tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart

Index: tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart
diff --git a/tests/compiler/dart2js/js_backend_cps_ir_operators.dart b/tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart
similarity index 91%
rename from tests/compiler/dart2js/js_backend_cps_ir_operators.dart
rename to tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart
index 781dde163343504220f9e088198a02baac4b9d7d..18aa0c52aa30912733722fd6c0f2e4f78b50e86d 100644
--- a/tests/compiler/dart2js/js_backend_cps_ir_operators.dart
+++ b/tests/compiler/dart2js/js_backend_cps_ir_operators_test.dart
@@ -1,12 +1,13 @@
 // 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.
+// VMOptions=-DUSE_CPS_IR=true
 
 // Tests of operators.
 
 library operators_tests;
 
-import 'js_backend_cps_ir_test.dart';
+import 'js_backend_cps_ir.dart';
 
 const List<TestEntry> tests = const [
   const TestEntry("main() { return true ? 42 : 'foo'; }"),
@@ -43,3 +44,7 @@ main() { print(foo || foo); }""",
   return null;
 }"""),
 ];
+
+void main() {
+  runTests(tests);
+}