Enable causal stacktrace in kernel

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 d2fc2f6e9dbbcd664a835ac743175602cf6278f6..64b6dc47c7e6c4c81360634a2ad8c83460580733 100644
--- a/tests/language/language_kernel.status
+++ b/tests/language/language_kernel.status
@@ -44,10 +44,10 @@ vm/debug_break_enabled_vm_test/01: CompileTimeError
 vm/debug_break_enabled_vm_test/none: CompileTimeError
 vm/reflect_core_vm_test: CompileTimeError
 vm/regress_27201_test: CompileTimeError
-vm/regress_28325_test: RuntimeError  # Issue 28055.
 generic_function_typedef2_test: DartkCrash # Issue 27969
 generic_function_typedef_test: DartkCrash # Issue 27969
 function_type/function_type*: DartkCrash # Issue 27969
+vm/regress_28325_test: Pass # Issue 28055. Passes by mistake.
 
 # dartk: JIT failures
 [ $compiler == dartk && $runtime == vm ]
@@ -206,10 +206,6 @@ library_env_test/has_no_mirror_support: RuntimeError
 main_not_a_function_test/01: Crash
 redirecting_factory_reflection_test: RuntimeError
 
-# Casual async stack traces are not implemented for Kernel.
-vm/causal_async_exception_stack_test: RuntimeError
-vm/causal_async_exception_stack2_test: RuntimeError
-
 # dartk: JIT failures (debug)
 [ $compiler == dartk && $runtime == vm && $mode == debug ]
 not_enough_positional_arguments_test/02: Crash  # Dartk Issue 28301