Fix up dromaeo after lib v2 merge and add Dromaeo smoketest to prevent future

samples/third_party/dromaeo/Suites.dart

Index: samples/third_party/dromaeo/Suites.dart
diff --git a/samples/third_party/dromaeo/Suites.dart b/samples/third_party/dromaeo/Suites.dart
index 7e6ad08d8df2d0cc8a86e84a1e0c358180df421d..5f06e98aafd1927821fe93b294c7367e554c6bac 100644
--- a/samples/third_party/dromaeo/Suites.dart
+++ b/samples/third_party/dromaeo/Suites.dart
@@ -72,6 +72,13 @@ class Suites {
           'Traversing a DOM structure',
           const ['traverse'],
           _CORE_TEST_OPTIONS),
+      const SuiteDescription(
+          '../../../../../tests/html/dromaeo_smoke.html',
+          'Smoke test',
+          const Origin('', ''),
+          'Dromaeo no-op smoke test',
+          const ['nothing'],
+          _CORE_TEST_OPTIONS),
   ];
 
   // Mappings from original path to actual path given platform/library.