Add mirror tests for generic interfaces. Add base-language test for malbounded interfaces.

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 6bd9b5a2c3560ccd35dca6cdd7da38cd87cbedae..5363035c60e477bcd64d8cdae42426ab29235b53 100644
--- a/tests/language/language_dart2js.status
+++ b/tests/language/language_dart2js.status
@@ -50,6 +50,13 @@ f_bounded_quantification5_test: Fail # Issue 12703
 closure_type_test: Fail # Issue 12745
 function_subtype_setter0_test: Fail # Issue 11273
 redirecting_factory_malbounded_test/01: Fail # Issue 12825
+malbounded_instantiation_test/01: Fail # Issue 14121
+malbounded_instantiation_test/02: Fail # Issue 14121
+malbounded_instantiation_test/03: Fail # Issue 14121
+malbounded_type_cast_test: Fail
+malbounded_type_test_test/01: Fail
+malbounded_type_test_test/02: Fail
+malbounded_type_test_test/03: Fail
 
 [ $compiler == dart2js && $unchecked ]
 type_checks_in_factory_method_test: RuntimeError # Issue 12746
@@ -290,6 +297,12 @@ compile_time_constant_checked3_test/04: Fail, OK
 compile_time_constant_checked3_test/05: Fail, OK
 compile_time_constant_checked3_test/06: Fail, OK
 
+[ $compiler == dart2dart && $checked ]
+# VM problems
+malbounded_type_cast_test: Fail
+malbounded_type_test_test/01: Fail
+malbounded_instantiation_test/01: Fail
+
 [ $compiler == dart2dart && $minified ]
 super_getter_setter_test: Fail # Issue 11065.
 f_bounded_quantification4_test: Fail # Issue 12605.