dart2js: Fix csp minified.

tests/html/canvas_pixel_array_type_alias_test.dart

Index: tests/html/canvas_pixel_array_type_alias_test.dart
diff --git a/tests/html/canvas_pixel_array_type_alias_test.dart b/tests/html/canvas_pixel_array_type_alias_test.dart
index f346850f3c5d2aafe043ee01892696443a1ff6c0..4dd6b407825f0e081bf0bc6b8e83e2283d71291e 100644
--- a/tests/html/canvas_pixel_array_type_alias_test.dart
+++ b/tests/html/canvas_pixel_array_type_alias_test.dart
@@ -94,7 +94,9 @@ main() {
       var data = context.createImageData(canvas.width, canvas.height).data;
       expect(inscrutable(data).runtimeType == data.runtimeType, isTrue);
     });
+  });
 
+  group('types2_runtimeTypeName', () {
     test('runtimeTypeName', () {
       var data = context.createImageData(canvas.width, canvas.height).data;
       expect('${inscrutable(data).runtimeType}', 'Uint8ClampedList');