Update dart2js unit tests to new library API.

dart/tests/utils/dummy_compiler_test.dart

Index: dart/tests/utils/dummy_compiler_test.dart
diff --git a/dart/tests/utils/dummy_compiler_test.dart b/dart/tests/utils/dummy_compiler_test.dart
index 9cbd95a96c6e46f0f891d65d8b88e62701597b47..2cf2539c6ddad00885004dd15175b87f7e41e0d1 100644
--- a/dart/tests/utils/dummy_compiler_test.dart
+++ b/dart/tests/utils/dummy_compiler_test.dart
@@ -3,12 +3,12 @@
 // BSD-style license that can be found in the LICENSE file.
 
 // Smoke test of the dart2js compiler API.
+library dummy_compiler;
 
 import 'dart:async';
-library dummy_compiler;
+import 'dart:uri';
 
 import '../../sdk/lib/_internal/compiler/compiler.dart';
-import 'dart:uri';
 
 Future<String> provider(Uri uri) {
   Completer<String> completer = new Completer<String>();