Update test status files. Issue #24990.

tests/language/language.status

Index: tests/language/language.status
diff --git a/tests/language/language.status b/tests/language/language.status
index c2d3f8887f050ebb69032c2a00a793275cea330f..f8fc23fa8ad5ccdb3623f0c8488a3b06c28fb518 100644
--- a/tests/language/language.status
+++ b/tests/language/language.status
@@ -63,7 +63,7 @@ vm/type_vm_test: Fail # Issue 14651.
 
 [ $compiler == none && ( $runtime == dartium || $runtime == drt || $runtime == ContentShellOnAndroid) ]
 issue13474_test: Pass, Fail # Issue 14651.
-vm/optimized_guarded_field_isolates_test: Fail # Issue 13921.
+vm/optimized_guarded_field_isolates_test: Skip # Passes mysteriously, issues 24990, 13921.
 main_test/01: Fail # Issue 20028
 main_test/02: Fail # Issue 20028
 main_test/04: Fail # Issue 20028
@@ -97,7 +97,7 @@ gc_test: SkipSlow # Times out flakily. Issue 20956
 vm/load_to_load_unaligned_forwarding_vm_test: Pass, Crash # Unaligned offset. Issue 22151
 
 [ $compiler == none && ( $runtime == dartium || $runtime == drt ) ]
-issue23244_test: Fail # Can't run spawnFunction on dartium.
+issue23244_test: Skip # Issue 24990
 
 [ $compiler == none && ($runtime == vm || $runtime == drt || $runtime == dartium) && $arch == ia32 ]
 vm/regress_24517_test: Pass, Fail # Issue 24517.