Updating code_transformers to not fail on syntax errors

pkg/code_transformers/test/entry_point_test.dart

Index: pkg/code_transformers/test/entry_point_test.dart
diff --git a/pkg/code_transformers/test/entry_point_test.dart b/pkg/code_transformers/test/entry_point_test.dart
index 1000aceca62ec2c97e528938efd082f72c5060af..a3844445681574a58f9b5c2b3640ab89b889bc0e 100644
--- a/pkg/code_transformers/test/entry_point_test.dart
+++ b/pkg/code_transformers/test/entry_point_test.dart
@@ -76,6 +76,22 @@ main() {
           },
           expectation: true);
     });
+
+    test('is tolerant of syntax errors with main', () {
+      return checkDartEntry(
+          inputs: {
+            'a|web/main.dart': 'main() {} {',
+          },
+          expectation: true);
+    });
+
+    test('is tolerant of syntax errors without main', () {
+      return checkDartEntry(
+          inputs: {
+            'a|web/main.dart': 'class Foo {',
+          },
+          expectation: false);
+    });
   });
 }