Remove support for conflicting constructors.

tests/language/language.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.
 
 # This directory contains tests that are intended to show the
 # current state of the language.
 
 # In order to maintain maximum test coverage for all builds,
 # please use the following procedure to mark a test
 # failed on architectures other than the one you are working on.
@@ skipping 181 matching lines @@
 final_syntax_test/03: Fail # http://dartbug.com/5519
 final_syntax_test/04: Fail # http://dartbug.com/5519
 getter_no_setter_test/01: Fail # http://dartbug.com/5519
 isnot_malformed_type_test/01: Fail # http://dartbug.com/5519
 named_parameters_aggregated_test/01: Fail # http://dartbug.com/5519
 named_parameters_aggregated_test/03: Fail # http://dartbug.com/5519
 not_enough_positional_arguments_test/01: Fail # http://dartbug.com/5519
 
 metadata_test: Fail
 # Fails in conservative mode, issue 4935, passes in minifinying mode.
-bad_constructor_test/04: Fail
-bad_constructor_test/05: Fail
-bad_constructor_test/06: Fail
 argument_definition_test/*: Skip # Not implemented.
 const_var_test: Pass, Fail # Map literals take 2 type arguments.
 map_literal3_test: Fail # Map literals take 2 type arguments.
 class_cycle_negative_test: Fail, OK # Bad test: assumes eager loading.
 interface_cycle_negative_test: Fail, OK # Bad test: assumes eager loading.
 # Common problems with dart2js.  In illegal family, invalid
 # declarations are simply not parsed.  In pseudo kw dart2js
 # chokes on things like typedef(x) => "typedef $x" and alike.
 abstract_syntax_test/01: Fail
 abstract_syntax_test/02: Fail
@@ skipping 109 matching lines @@
 [ $arch == mips ]
 *: Skip
 
 
 [ $arch == simmips ]
 arithmetic_test: Crash  # Too far relative branch.
 large_implicit_getter_test: Crash  # Too far relative branch.
 # TODO(zra): Check to see if the ASSERT that fails in debug mode is correct
 stack_overflow_test: Crash, Pass # Passes in release mode.
 stack_overflow_stacktrace_test: Crash, Pass # Passes in release mode.