VM: [Kernel] Skip large_class_declaration_test with --compiler=dartk/dartkp

tests/language/language_kernel.status

Index: tests/language/language_kernel.status
diff --git a/tests/language/language_kernel.status b/tests/language/language_kernel.status
index 1853cccfc13385df0e822a343687de6440190704..979c590fcdc5abd19e1b18f0dd01eb512350fa03 100644
--- a/tests/language/language_kernel.status
+++ b/tests/language/language_kernel.status
@@ -3,10 +3,8 @@
 # BSD-style license that can be found in the LICENSE file.
 
 # These tests currently take too long. Remove when they are fixed.
-[ $compiler == dartk ]
-large_class_declaration_test: Skip
-large_implicit_getter_test: Skip
-larger_implicit_getter_test: Skip
+[ $compiler == dartk || $compiler == dartkp ]
+large_class_declaration_test: SkipSlow  # KernelVM Issue 28312
 
 ###############################################################################
 # Dartk Entries
@@ -355,7 +353,6 @@ not_enough_positional_arguments_test/05: Crash  # Dartk Issue 28301
 # dartk: precompilation failures
 [ $compiler == dartkp && $runtime == dart_precompiled ]
 if_null_assignment_static_test/35: Crash  # Dartk Issue 28302
-large_class_declaration_test: Pass, Slow
 string_interpolation7_test: RuntimeError  # Dartk Issue 28306
 
 # dartk: precompilation failures (debug)