Implement override checks.

dart/tests/language/language_dart2js.status

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 [ $compiler == dart2js && $checked ]
 assign_static_type_test/01: Fail
 assign_static_type_test/02: Fail
 assign_static_type_test/03: Fail
 assign_static_type_test/04: Fail
 type_variable_bounds_test/01: Fail
@@ skipping 16 matching lines @@
 f_bounded_quantification_test/02: Fail
 default_factory2_test/01: Fail # Type bounds for type variable not checked.
 function_type_test: Fail # does not detect type error in checked mode.
 
 arithmetic_test: Fail
 
 [ $compiler == dart2js && $unchecked ]
 assertion_test: Fail, OK
 
 [ $compiler == dart2js ]
-fauxverride_test/05: Fail # TODO(ahe): I have a pending CL for this.
 compile_time_constant8_test: Fail # We don't take the generic type into account yet.
 static_initializer_type_error_test: Fail # Checked mode not supported.
 exception_test: Fail # "throw null" throws NullPointerException.
 
 # Compilation errors.
 ct_const_test: Fail # We don't take the generic type into account yet.
 call_operator_test: Fail # Unexpected token 'call'
 char_escape_test: Fail # Unhandled non-BMP character: U+10000
 constructor6_test: Fail # Closures inside initializers not implemented.
 default_factory_library_test: Fail # lib is not a type
@@ skipping 111 matching lines @@
 map_literal1_negative_test: Fail, OK # Negative language test.
 map_literal2_negative_test: Fail, OK # Negative language test.
 new_expression_type_args_frog_test/02: Fail, OK # Negative language test.
 non_const_super_negative_test: Fail, OK # Negative language test.
 number_identifier_negative_test: Fail, OK # Negative language test.
 operator1_negative_test: Fail, OK # Negative language test.
 override_field_method1_negative_test: Fail, OK # Negative language test.
 override_field_method2_negative_test: Fail, OK # Negative language test.
 override_field_method3_negative_test: Fail, OK # Negative language test.
 override_field_method6_negative_test: Fail, OK # Negative language test.
-override_field_test/01: Fail, OK # Negative language test.
-override_field_test/04: Fail, OK # Negative language test.
+override_field_test/04: Fail, OK # Broken test.
 override_method_with_field_test/01: Fail, OK # Negative language test.
 prefix16_test: Fail
 prefix18_negative_test: Fail, OK # Negative language test.
 prefix20_negative_test: Fail, OK # Negative language test.
 prefix23_negative_test: Fail, OK # Negative language test.
 pseudo_kw_illegal_test/01: Fail, OK # Negative language test.
 pseudo_kw_illegal_test/03: Fail, OK # Negative language test.
 pseudo_kw_illegal_test/05: Fail, OK # Negative language test.
 pseudo_kw_illegal_test/06: Fail, OK # Negative language test.
 pseudo_kw_illegal_test/07: Fail, OK # Negative language test.
@@ skipping 43 matching lines @@
 
 [ $compiler == dart2js && $mode == release ]
 assign_top_method_negative_test: Crash
 
 
 [ $compiler == dart2js && $runtime == none ]
 *: Fail, Pass # TODO(ahe): Triage these tests.
 
 
 [ $compiler == dart2js && ($runtime == ff || $runtime == safari || $runtime == d8 || $runtime == drt || $runtime == chrome) ]
-class_override_negative_test: Fail, OK # Negative language test.
 override_field_method4_negative_test: Fail, OK # Negative language test.
 override_field_method5_negative_test: Fail, OK # Negative language test.
 
 
 [ $compiler == dart2js && $runtime == ff ]
 call_through_getter_test: Fail # Expected: ObjectNotClosureException got: Instance of 'TypeError'
 call_through_null_getter_test: Fail # Expected: ObjectNotClosureException got: Instance of 'TypeError'
 double_to_string_as_fixed_test: Fail
 double_to_string_as_exponential_test: Fail
 
@@ skipping 49 matching lines @@
 
 
 [ $compiler == dart2js && $runtime == safari ]
 arithmetic_test: Skip # BUG(3492): Times out.
 call_through_getter_test: Fail # Expected: ObjectNotClosureException got: Instance of 'TypeError'
 call_through_null_getter_test: Fail # Expected: ObjectNotClosureException got: Instance of 'TypeError'
 closure3_test: Fail # Uncaught error: Instance of 'TypeError'
 method_invocation_test: Fail # Uncaught error: Instance of 'TypeError'
 null_pointer_exception_test: Fail # Uncaught error: Instance of 'TypeError'
 string_interpolate_npe_test: Fail # Uncaught error: Instance of 'TypeError'