Support for analysis.setPriorityFiles for files in SDK.

pkg/analysis_server/test/analysis/test_all.dart

Index: pkg/analysis_server/test/analysis/test_all.dart
diff --git a/pkg/analysis_server/test/analysis/test_all.dart b/pkg/analysis_server/test/analysis/test_all.dart
index 71b2a095fc0ea1897724571dff9669df6b561b9a..67d28c24c15ce596b589d9abc855065269115051 100644
--- a/pkg/analysis_server/test/analysis/test_all.dart
+++ b/pkg/analysis_server/test/analysis/test_all.dart
@@ -18,6 +18,7 @@ import 'notification_navigation_test.dart' as notification_navigation_test;
 import 'notification_occurrences_test.dart' as notification_occurrences_test;
 import 'notification_outline_test.dart' as notification_outline_test;
 import 'notification_overrides_test.dart' as notification_overrides_test;
+import 'set_priority_files_test.dart' as set_priority_files_test;
 import 'update_content_test.dart' as update_content_test;
 
 /**
@@ -37,6 +38,7 @@ main() {
     notification_occurrences_test.main();
     notification_outline_test.main();
     notification_overrides_test.main();
+    set_priority_files_test.main();
     update_content_test.main();
   });
 }