Mark more analyzer tests as slow.

pkg/pkg.status

Index: pkg/pkg.status
diff --git a/pkg/pkg.status b/pkg/pkg.status
index 81eef5d47c8b91e7544d07d4ea68ebb991d558a4..b8e4b5653ab778bd6add607fb823b8a2ae37f242 100644
--- a/pkg/pkg.status
+++ b/pkg/pkg.status
@@ -75,16 +75,20 @@ analysis_server/test/search/element_reference_test: Pass, Slow # Issue 19756
 analysis_server/index/store/codec_test: Pass, Slow # Issue 19756
 
 [ $compiler == dart2js ]
-analysis_server/test/edit/refactoring_test: Pass, Slow # Issue 16473, 19756
-analysis_server/test/analysis_notification_occurrences_test: Pass, Slow # Issue 16473, 19756
-analysis_server/test/analysis_notification_outline_test: Pass, Slow # Issue 16473, 19756
-analysis_server/test/analysis_notification_navigation_test: Pass, Slow # Issue 16473, 19756
-analysis_server/test/domain_analysis_test: Pass, Slow # Issue 16473, 19756
-analysis_server/test/analysis_notification_highlights_test: Pass, Slow # 16473, 19756
-analysis_server/test/search/top_level_declarations_test: Pass, Slow # 16473, 19756
-analysis_server/test/socket_server_test: Pass, Slow # Issue 16473, 19756
-analyzer/test/generated/element_test: Pass, Slow # Issue 16473
-analyzer/test/generated/incremental_resolver_test: Pass, Slow # Issue 16473
+analysis_server/test/edit/refactoring_test: Pass, Slow # Issue 19756, 21628
+analysis_server/test/analysis_notification_occurrences_test: Pass, Slow # Issue 19756, 21628
+analysis_server/test/analysis_notification_outline_test: Pass, Slow # Issue 19756, 21628
+analysis_server/test/analysis_notification_navigation_test: Pass, Slow # Issue 19756, 21628
+analysis_server/test/domain_analysis_test: Pass, Slow # Issue 19756, 21628
+analysis_server/test/analysis_notification_highlights_test: Pass, Slow # 19756, 21628
+analysis_server/test/search/top_level_declarations_test: Pass, Slow # 19756, 21628
+analysis_server/test/socket_server_test: Pass, Slow # Issue 19756, 21628
+analyzer/test/generated/all_the_rest_test: Pass, Slow # Issue 21628
+analyzer/test/generated/element_test: Pass, Slow # Issue 21628
+analyzer/test/generated/incremental_resolver_test: Pass, Slow # Issue 21628
+analyzer/test/generated/utilities_test: Pass, Slow # Issue 21628
+analyzer/test/generated/parser_test: Pass, Slow # Issue 21628
+analyzer/test/src/task/dart_test: Pass, Slow # Issue 21628
 
 [ $runtime == jsshell ]
 async/test/stream_zip_test: RuntimeError, OK # Timers are not supported.