Update status file for timing-out tests on windows.

tests/co19/co19-runtime.status

Index: tests/co19/co19-runtime.status
diff --git a/tests/co19/co19-runtime.status b/tests/co19/co19-runtime.status
index 081f67a2f9da9d0aebb98e8cf49b8019558e3f32..a11b526da2266d6359c16e586075f9b7e1bbb66b 100644
--- a/tests/co19/co19-runtime.status
+++ b/tests/co19/co19-runtime.status
@@ -81,6 +81,10 @@ LibTest/collection/ListBase/ListBase_class_A01_t01: Skip  # Timeout
 LibTest/collection/ListMixin/ListMixin_class_A01_t02: Skip  # Timeout
 LibTest/collection/ListBase/ListBase_class_A01_t02: Skip  # Timeout
 
+[ ($compiler == none || $compiler == precompiler) && $system == windows ]
+LibTest/collection/ListMixin/ListMixin_class_A01_t02: Pass, Slow
+LibTest/collection/ListBase/ListBase_class_A01_t02: Pass, Slow
+
 [ ($runtime == vm || $runtime == dart_precompiled) ]
 LibTest/isolate/Isolate/spawn_A02_t01: Skip # co19 issue 667
 LibTest/html/*: SkipByDesign # dart:html not supported on VM.
@@ -154,4 +158,4 @@ Language/Expressions/Property_Extraction/Named_Constructor_Extraction/deferred_t
 Language/Metadata/*: Skip # Uses dart:mirrors
 
 [ $runtime == dart_precompiled ]
-LibTest/isolate/Isolate/spawnUri*: RuntimeError # Isolate.spawnUri
+LibTest/isolate/Isolate/spawnUri*: RuntimeError # Isolate.spawnUri