Add types referenced in is-checks to the class hierarchy

tests/language_2/language_2_dart2js.status

Index: tests/language_2/language_2_dart2js.status
diff --git a/tests/language_2/language_2_dart2js.status b/tests/language_2/language_2_dart2js.status
index c2d7933db327c9eb65ab73b3fa9a63e8ef20ad90..683051fd850336aa850f1ffe5b528daf68210016 100644
--- a/tests/language_2/language_2_dart2js.status
+++ b/tests/language_2/language_2_dart2js.status
@@ -543,7 +543,6 @@ generic_methods_tearoff_specialization_test: Crash # Unsupported operation: Unsu
 generic_methods_type_expression_test: Crash # type 'JClass' is not a subtype of type 'ClassElement' of 'contextClass' where
 generic_native_test: Crash # NoSuchMethodError: The method 'hasSubclass' was called on null.
 generic_sync_star_test: RuntimeError
-generic_syntax_test: Crash # NoSuchMethodError: The method 'hasSubclass' was called on null.
 generic_test: RuntimeError
 generic_typedef_test: Crash # Unsupported operation: Unsupported type parameter type node T.
 getter_override2_test/02: MissingCompileTimeError
@@ -561,7 +560,6 @@ if_null_assignment_static_test/05: RuntimeError
 many_generic_instanceof_test: Crash # type 'JClass' is not a subtype of type 'ClassElement' of 'contextClass' where
 regress_30339_test: Crash # type 'JClass' is not a subtype of type 'ClassElement' of 'contextClass' where
 type_variable_nested_test/01: Crash # NoSuchMethodError: The method 'hasSubclass' was called on null.
-type_variable_nested_test/none: Crash # NoSuchMethodError: The method 'hasSubclass' was called on null.
 unused_overridden_async_test: Crash # type 'JClass' is not a subtype of type 'ClassElement' of 'contextClass' where
 vm/allocation_sinking_vm_test: RuntimeError
 vm/async_await_catch_stacktrace_test: Crash # type 'JClass' is not a subtype of type 'ClassElement' of 'contextClass' where
@@ -718,7 +716,6 @@ generic_methods_tearoff_specialization_test: Crash # Unsupported operation: Unsu
 generic_methods_type_expression_test: Crash # NoSuchMethodError: Class 'JClass' has no instance getter 'typeVariables'.
 generic_native_test: Crash # NoSuchMethodError: The method 'hasSubclass' was called on null.
 generic_sync_star_test: RuntimeError
-generic_syntax_test: Crash # NoSuchMethodError: The method 'hasSubclass' was called on null.
 generic_test: RuntimeError
 generic_typedef_test: Crash # Unsupported operation: Unsupported type parameter type node T.
 getter_override2_test/02: MissingCompileTimeError
@@ -736,7 +733,6 @@ if_null_assignment_static_test/05: RuntimeError
 many_generic_instanceof_test: Crash # NoSuchMethodError: Class 'JClass' has no instance getter 'typeVariables'.
 regress_30339_test: Crash # NoSuchMethodError: Class 'JClass' has no instance getter 'typeVariables'.
 type_variable_nested_test/01: Crash # NoSuchMethodError: The method 'hasSubclass' was called on null.
-type_variable_nested_test/none: Crash # NoSuchMethodError: The method 'hasSubclass' was called on null.
 unused_overridden_async_test: Crash # NoSuchMethodError: Class 'JClass' has no instance getter 'typeVariables'.
 vm/allocation_sinking_vm_test: RuntimeError
 vm/async_await_catch_stacktrace_test: Crash # NoSuchMethodError: Class 'JClass' has no instance getter 'typeVariables'.