Revert breaking change

pkg/analyzer/test/test_all.dart

Index: pkg/analyzer/test/test_all.dart
diff --git a/pkg/analyzer/test/test_all.dart b/pkg/analyzer/test/test_all.dart
index 222beb809bf7a052d254e082fb3ce3ffc8a99558..cd9450ce24ed52c77b50e99f5618b29c30a3e412 100644
--- a/pkg/analyzer/test/test_all.dart
+++ b/pkg/analyzer/test/test_all.dart
@@ -12,6 +12,7 @@ import 'file_system/test_all.dart' as file_system;
 import 'generated/test_all.dart' as generated;
 import 'instrumentation/test_all.dart' as instrumentation;
 import 'parse_compilation_unit_test.dart' as parse_compilation_unit;
+import 'plugin/test_all.dart' as plugin_test_all;
 import 'source/test_all.dart' as source;
 import 'src/test_all.dart' as src;
 import 'task/test_all.dart' as task;
@@ -26,6 +27,7 @@ main() {
     generated.main();
     instrumentation.main();
     parse_compilation_unit.main();
+    plugin_test_all.main();
     source.main();
     src.main();
     task.main();