fixes #27385, implement virtual fields in DDC

pkg/dev_compiler/test/not_yet_strong_tests.dart

 import 'dart:collection';
 
 /// The set of tests that are not yet strong mode safe.
 final notYetStrongTests = new HashSet<String>.from([
   'language/abstract_exact_selector_test_01_multi',
   'language/abstract_factory_constructor_test_00_multi',
   'language/abstract_getter_test_01_multi',
   'language/abstract_runtime_error_test_01_multi',
   'language/abstract_runtime_error_test_02_multi',
   'language/abstract_runtime_error_test_03_multi',
@@ skipping 648 matching lines @@
   'language/field_override2_test',
   'language/field_override3_test_00_multi',
   'language/field_override3_test_01_multi',
   'language/field_override3_test_02_multi',
   'language/field_override3_test_03_multi',
   'language/field_override4_test_00_multi',
   'language/field_override4_test_02_multi',
   'language/field_override_test_01_multi',
   'language/field_override_test_02_multi',
   'language/field_override_test_none_multi',
-  'language/field_test',
   'language/field_type_check_test_01_multi',
   'language/final_field_initialization_order_test',
   'language/final_for_in_variable_test_01_multi',
   'language/final_is_not_const_test_01_multi',
   'language/final_param_test_01_multi',
   'language/final_super_field_set_test_01_multi',
   'language/final_syntax_test_09_multi',
   'language/final_syntax_test_10_multi',
   'language/final_variable_assignment_test_01_multi',
   'language/final_variable_assignment_test_02_multi',
@@ skipping 662 matching lines @@
   'language/override_inheritance_field_test_11_multi',
   'language/override_inheritance_field_test_26_multi',
   'language/override_inheritance_field_test_28_multi',
   'language/override_inheritance_field_test_29_multi',
   'language/override_inheritance_field_test_30_multi',
   'language/override_inheritance_field_test_31_multi',
   'language/override_inheritance_field_test_32_multi',
   'language/override_inheritance_field_test_33_multi',
   'language/override_inheritance_field_test_33a_multi',
   'language/override_inheritance_field_test_34_multi',
-  'language/override_inheritance_field_test_41_multi',
   'language/override_inheritance_field_test_42_multi',
   'language/override_inheritance_field_test_43_multi',
   'language/override_inheritance_field_test_44_multi',
   'language/override_inheritance_field_test_45_multi',
-  'language/override_inheritance_field_test_46_multi',
   'language/override_inheritance_field_test_47_multi',
   'language/override_inheritance_field_test_48_multi',
   'language/override_inheritance_field_test_49_multi',
   'language/override_inheritance_field_test_50_multi',
   'language/override_inheritance_field_test_53_multi',
   'language/override_inheritance_field_test_54_multi',
   'language/override_inheritance_generic_test_02_multi',
   'language/override_inheritance_generic_test_04_multi',
   'language/override_inheritance_generic_test_06_multi',
   'language/override_inheritance_generic_test_07_multi',
@@ skipping 113 matching lines @@
   'language/regress_21912_test_02_multi',
   'language/regress_22438_test',
   'language/regress_22936_test_01_multi',
   'language/regress_23038_test_01_multi',
   'language/regress_23051_test_01_multi',
   'language/regress_23408_test',
   'language/return_type_test',
   'language/rewrite_implicit_this_test_01_multi',
   'language/scope_variable_test_01_multi',
   'language/setter_no_getter_call_test_01_multi',
-  'language/setter_override2_test_00_multi',
   'language/setter_override_test_00_multi',
   'language/setter_override_test_01_multi',
   'language/setter_override_test_02_multi',
   'language/setter_override_test_03_multi',
   'language/static_field1_test',
   'language/static_field1a_test',
   'language/static_field2_test',
   'language/static_field2a_test',
   'language/static_field3_test_01_multi',
   'language/static_field3_test_02_multi',
@@ skipping 251 matching lines @@
   'language/type_parameter_test_06_multi',
   'language/type_parameter_test_none_multi',
   'language/type_promotion_assign_test_01_multi',
   'language/type_promotion_assign_test_02_multi',
   'language/type_promotion_assign_test_03_multi',
   'language/type_promotion_assign_test_04_multi',
   'language/type_promotion_closure_test_01_multi',
   'language/type_promotion_closure_test_02_multi',
   'language/type_promotion_closure_test_03_multi',
   'language/type_promotion_closure_test_04_multi',
-  'language/type_promotion_closure_test_05_multi',
   'language/type_promotion_closure_test_06_multi',
   'language/type_promotion_closure_test_07_multi',
-  'language/type_promotion_closure_test_08_multi',
   'language/type_promotion_closure_test_09_multi',
   'language/type_promotion_closure_test_10_multi',
   'language/type_promotion_closure_test_11_multi',
   'language/type_promotion_closure_test_12_multi',
   'language/type_promotion_closure_test_13_multi',
   'language/type_promotion_closure_test_14_multi',
   'language/type_promotion_closure_test_15_multi',
   'language/type_promotion_closure_test_16_multi',
-  'language/type_promotion_closure_test_none_multi',
   'language/type_promotion_functions_test_01_multi',
   'language/type_promotion_functions_test_02_multi',
   'language/type_promotion_functions_test_03_multi',
   'language/type_promotion_functions_test_04_multi',
   'language/type_promotion_functions_test_05_multi',
   'language/type_promotion_functions_test_06_multi',
   'language/type_promotion_functions_test_07_multi',
   'language/type_promotion_functions_test_08_multi',
   'language/type_promotion_functions_test_09_multi',
   'language/type_promotion_functions_test_10_multi',
@@ skipping 344 matching lines @@
   'lib/mirrors/generics_test_01_multi',
   'lib/mirrors/get_symbol_name_no_such_method_test',
   'lib/mirrors/immutable_collections_test',
   'lib/mirrors/inference_and_no_such_method_test',
   'lib/mirrors/inherit_field_test',
   'lib/mirrors/initializing_formals_test_01_multi',
   'lib/mirrors/initializing_formals_test_03_multi',
   'lib/mirrors/initializing_formals_test_none_multi',
   'lib/mirrors/instance_members_easier_test',
   'lib/mirrors/instance_members_test',
-  'lib/mirrors/instance_members_with_override_test',
   'lib/mirrors/intercepted_class_test',
   'lib/mirrors/intercepted_object_test',
   'lib/mirrors/invoke_call_through_getter_previously_accessed_test_named_multi',
   'lib/mirrors/invoke_call_through_getter_previously_accessed_test_none_multi',
   'lib/mirrors/invoke_call_through_getter_test_named_multi',
   'lib/mirrors/invoke_call_through_getter_test_none_multi',
   'lib/mirrors/invoke_call_through_implicit_getter_previously_accessed_test_named_multi',
   'lib/mirrors/invoke_call_through_implicit_getter_previously_accessed_test_none_multi',
   'lib/mirrors/invoke_call_through_implicit_getter_test',
   'lib/mirrors/lazy_static_test',
@@ skipping 115 matching lines @@
   'lib/mirrors/typedef_reflected_type_test_none_multi',
   'lib/mirrors/variable_is_const_test_01_multi',
   'language/application_negative_test',
   'language/assign_instance_method_negative_test',
   'language/bad_initializer1_negative_test',
   'language/bad_initializer2_negative_test',
   'language/bad_named_constructor_negative_test',
   'language/body_less_constructor_wrong_arg_negative_test',
   'language/bound_closure_equality_test',
   'language/call_test',
-  'language/closure_with_super_field_test',
   'language/const_counter_negative_test',
   'language/const_map4_test',
   'language/const_optional_args_negative_test',
   'language/constructor3_negative_test',
   'language/constructor_call_wrong_argument_count_negative_test',
   'language/constructor_redirect1_negative_test',
   'language/constructor_redirect2_negative_test',
   'language/constructor_setter_negative_test',
   'language/ct_const_test',
   'language/duplicate_export_negative_test',
   'language/duplicate_interface_negative_test',
   'language/export_ambiguous_main_negative_test',
   'language/extend_type_parameter2_negative_test',
   'language/extend_type_parameter_negative_test',
   'language/factory2_negative_test',
   'language/factory3_negative_test',
   'language/factory_negative_test',
   'language/field1_negative_test',
   'language/field2_negative_test',
   'language/field3_negative_test',
   'language/field4_negative_test',
   'language/field5_negative_test',
   'language/field6_negative_test',
   'language/field6a_negative_test',
   'language/field_method4_negative_test',
   'language/function_type_alias_test',
   'language/function_type_parameter2_negative_test',
   'language/function_type_parameter_negative_test',
   'language/getter_declaration_negative_test',
-  'language/getter_override2_test_00_multi',
-  'language/getters_setters_test',
   'language/import_combinators_negative_test',
   'language/initializing_formal_type_test',
   'language/inst_field_initializer1_negative_test',
   'language/instance_call_wrong_argument_count_negative_test',
   'language/instance_method2_negative_test',
   'language/instance_method_negative_test',
   'language/interface2_negative_test',
   'language/interface_injection1_negative_test',
   'language/interface_injection2_negative_test',
   'language/interface_static_method_negative_test',
@@ skipping 57 matching lines @@
   'language/string_interpolation1_negative_test',
   'language/string_interpolation2_negative_test',
   'language/string_interpolation3_negative_test',
   'language/string_interpolation4_negative_test',
   'language/string_interpolation5_negative_test',
   'language/string_interpolation6_negative_test',
   'language/string_unicode1_negative_test',
   'language/string_unicode2_negative_test',
   'language/string_unicode3_negative_test',
   'language/string_unicode4_negative_test',
-  'language/super_field_2_test',
-  'language/super_field_test',
   'language/switch1_negative_test',
   'language/switch3_negative_test',
   'language/switch4_negative_test',
   'language/switch5_negative_test',
   'language/switch7_negative_test',
   'language/test_negative_test',
   'language/type_variable_static_context_negative_test',
   'language/unary_plus_negative_test',
   'language/unhandled_exception_negative_test',
   'language/unresolved_in_factory_negative_test',
@@ skipping 24 matching lines @@
   'lib/html/mutationobserver_test',
   'lib/html/postmessage_structured_test',
   'lib/html/resource_http_test',
   'lib/html/transferables_test',
   'lib/html/webgl_1_test',
   'lib/html/wrapping_collections_test',
   // TODO(jmesserly): these are both under "dart:html" as well.
   'js_test',
   'js_util_test'
 ]);