Add types referenced in is-checks to the class hierarchy

tests/corelib_2/corelib_2.status

Index: tests/corelib_2/corelib_2.status
diff --git a/tests/corelib_2/corelib_2.status b/tests/corelib_2/corelib_2.status
index b7cbac48ca3354b2df9a4488d6d32c16907da9dc..e6e52d011c6eb3d2780d2c9aac3c89e7e59a9d75 100644
--- a/tests/corelib_2/corelib_2.status
+++ b/tests/corelib_2/corelib_2.status
@@ -524,6 +524,7 @@ data_uri_test: Crash
 dynamic_nosuchmethod_test: Crash # 'file:*/pkg/compiler/lib/src/ssa/locals_handler.dart': Failed assertion: line 425 pos 12: '!isStoredInClosureField(local)': Local local(NoSuchMethodError.toString#comma) is stored in a closure field.
 error_stack_trace1_test: Crash # 'file:*/pkg/compiler/lib/src/js_model/closure.dart': Failed assertion: line 197 pos 9: 'closure != null': Corresponding closure class not found for j:getter(Iterable.iterator). Closures found for (j:closure_call(Closure_fromTearOff_closure.call), j:closure_call(Maps_mapToString_closure.call), j:closure_call(unwrapException_closure.call))
 expando_test: Crash # 'file:*/pkg/compiler/lib/src/ssa/locals_handler.dart': Failed assertion: line 425 pos 12: '!isStoredInClosureField(local)': Local local(Maps.mapToString#first) is stored in a closure field.
+expando_test: RuntimeError
 for_in_test: Crash
 growable_list_test: Crash
 hash_map2_test: Crash
@@ -607,7 +608,6 @@ map_values4_test: Crash
 map_values_test: Crash
 maps_test: Crash
 nan_infinity_test/01: RuntimeError
-null_nosuchmethod_test: Crash
 queue_first_test: Crash
 queue_iterator_test: Crash
 queue_last_test: Crash
@@ -644,7 +644,6 @@ set_retainAll_test: Crash
 set_test: Crash
 set_to_string_test: Crash
 shuffle_test: Crash
-expando_test: RuntimeError
 splay_tree_from_iterable_test: Crash
 splay_tree_from_iterables_test: Crash
 splay_tree_test/01: Crash
@@ -851,7 +850,6 @@ map_values4_test: Crash
 map_values_test: Crash
 maps_test: Crash
 nan_infinity_test/01: RuntimeError
-null_nosuchmethod_test: Crash
 queue_first_test: Crash
 queue_iterator_test: Crash
 queue_last_test: Crash
@@ -862,6 +860,7 @@ reg_exp4_test: Crash
 reg_exp5_test: Crash
 reg_exp_all_matches_test: Crash
 reg_exp_start_end_test: Crash
+regexp/ascii-regexp-subject_test: Crash # RangeError (index): Invalid value: Only valid value is 0: 1
 regexp/ascii-regexp-subject_test: Timeout
 regexp/capture_test: Crash
 regexp/ecma-regex-examples_test: Crash
@@ -889,7 +888,6 @@ set_retainAll_test: Crash
 set_test: Crash
 set_to_string_test: Crash
 shuffle_test: Crash
-regexp/ascii-regexp-subject_test: Crash # RangeError (index): Invalid value: Only valid value is 0: 1
 splay_tree_from_iterable_test: Crash
 splay_tree_from_iterables_test: Crash
 splay_tree_test/01: Crash