dart2js: Change how super tear-offs are registered.

tests/language/language_dart2js.status

Index: tests/language/language_dart2js.status
diff --git a/tests/language/language_dart2js.status b/tests/language/language_dart2js.status
index 248585fb300ec0c958c4d5dbb19d08b27b6b8053..a7e5c4fd0b11966739dc83b8b1a7c3fdf4077944 100644
--- a/tests/language/language_dart2js.status
+++ b/tests/language/language_dart2js.status
@@ -350,11 +350,8 @@ overridden_no_such_method_test: RuntimeError # Please triage this failure.
 regress_22443_test: RuntimeError # M.loadLibrary is not a function
 regress_23408_test: RuntimeError # G.loadLibrary is not a function
 regress_23500_test/01: Crash # (await for(var c in new Stream.fromIterable([] )){}): await for
-super_bound_closure_test/01: RuntimeError # Cannot read property 'call' of undefined
-super_bound_closure_test/none: RuntimeError # Cannot read property 'call' of undefined
 super_call4_test: RuntimeError # Please triage this failure.
 super_getter_setter_test: Crash # Class 'PartialMethodElement' has no instance getter 'initializer'.
-super_implicit_closure_test: RuntimeError # Cannot read property 'call' of undefined
 super_operator_index5_test: Crash # (super[0]=42): visitUnresolvedSuperIndexSet
 super_operator_index7_test: Crash # (super[0]=42): visitUnresolvedSuperIndexSet
 super_operator_index8_test: Crash # (super[f()]=g()): visitUnresolvedSuperIndexSet