Refactor and simplify the dart2dart renamer.

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 || $compiler == dart2dart ]
 override_inheritance_mixed_test/08: Fail # Issue 18124
 override_inheritance_mixed_test/09: Fail # Issue 18124
 bad_constructor_test/05: CompileTimeError # Issue 13669
 full_stacktrace1_test: Pass, RuntimeError # Issue 12698
 full_stacktrace2_test: Pass, RuntimeError # Issue 12698
@@ skipping 163 matching lines @@
 call_through_null_getter_test: Fail
 closure3_test: Fail
 execute_finally3_test: Fail
 method_invocation_test: Fail
 stack_overflow_test: Fail
 stack_overflow_stacktrace_test: Fail
 closure_call_wrong_argument_count_negative_test: Skip
 label_test: Skip
 
 [ $compiler == dart2dart && $builder_tag == new_backend && $minified == false ]
-dynamic_test: RuntimeError # Issue 19751
-
-[ $compiler == dart2dart && $builder_tag == new_backend && $minified == false ]
 # This test happens not to fail in minified, because the type-argument is
 # renamed, but the unresolved reference to it is not.
 type_variable_conflict2_test/04: Fail # Issue 19725
 
 [ $compiler == dart2dart ]
 type_variable_conflict2_test/02: MissingCompileTimeError # Issue 19725
 type_variable_conflict2_test/06: MissingCompileTimeError # Issue 16180
 type_variable_conflict2_test/08: MissingCompileTimeError # Issue 16180
 type_variable_conflict2_test/10: MissingCompileTimeError # Issue 16180
 regress_13494_test: Fail # Issue 13494
 mixin_super_constructor_named_test: Fail # Issue 12631
 mixin_super_constructor_positionals_test: Fail # Issue 12631
 
 built_in_identifier_prefix_test: Fail # Issue 6972
 constructor_initializer_test/none: Fail # Issue 12633
-factory3_test: Fail # Issue 13077
-redirecting_factory_long_test: Fail # Issue 13077
-type_checks_in_factory_method_test: Fail # Issue 12747
 
 # Mixins fail on the VM.
 mixin_forwarding_constructor2_test: Fail # Issue 13641
 
 mixin_with_two_implicit_constructors_test: Fail # Issue 11889
 
 # Calling unresolved class constructor:
 call_nonexistent_constructor_test/01: Fail # Issue 13082
 call_nonexistent_constructor_test/02: Fail # Issue 13082
 
 bad_override_test/01: Fail # Issue 11496
 bad_override_test/02: Fail # Issue 11496
 
 constructor_named_arguments_test/01: Fail # Issue 5519
 not_enough_positional_arguments_test/01: Fail # Issue 12839
 not_enough_positional_arguments_test/02: Fail # Issue 12839
 not_enough_positional_arguments_test/05: Fail # Issue 12839
 
 metadata_test: Fail # Issue 12762
 const_evaluation_test/01: Fail # Issue 12762
 const_var_test: CompileTimeError # Issue 12794
 map_literal3_test: Fail # Issue 12794
 external_test/13: Fail # Issue 12888
 built_in_identifier_test/01: Fail # Issue 13022
 method_override4_test: Fail # Issue 12810
 method_override5_test: Fail # Issue 12810
 scope_variable_test/01: Fail # Issue 13016
 factory_redirection_test/01: Fail # Issue 12753
-factory_redirection_test/02: Crash # Issue 12753
-factory_redirection_test/03: Crash # Issue 12753
-factory_redirection_test/09: Fail # Issue 12753
 
 # DartVM problem.
 constructor5_test: Fail
 constructor6_test: Fail
 closure_in_initializer_test: Fail
 
 # Minified mode failures.
 
 new_expression_type_args_test/00: Fail # Wrongly reports compile-time error.
 new_expression_type_args_test/01: Fail # Wrongly reports compile-time error.
 
 deferred*: skip # Issue 17523
 cha_deopt1_test: skip # Issue 17523
 cha_deopt2_test: skip # Issue 17523
 cha_deopt3_test: skip # Issue 17523
 
 [ $compiler == dart2dart && $minified ]
 cyclic_type_test/0*: Fail # Issue 12605.
 cyclic_type2_test: Fail # Issue 12605.
 super_getter_setter_test: Fail # Issue 11065.
 f_bounded_quantification4_test: Fail # Issue 12605.
 f_bounded_quantification5_test: Fail # Issue 12605.
 type_variable_typedef_test: Fail # Issue 11467
-type_variable_conflict2_test/01: RuntimeError # Issue 16180
 
 invocation_mirror_test: Fail, OK # Issue 12706 (hardcoded names).
 super_call4_test: Fail, OK # hardcoded names.
 
 [ $minified ]
 stack_trace_test: Fail, OK # Stack trace not preserved in minified code.
 
 [ $runtime == ie9 ]
 stack_trace_test: Fail, OK # Stack traces not available in IE9.
 deferred_constraints_type_annotation_test/*: Fail, Pass # http://dartbug.com/12635
 deferred_constraints_constants_test/*: Fail, Pass # http://dartbug.com/12635
 deferred_no_such_method_test*: Fail, Pass # http://dartbug.com/12635
 deferred_constraints_type_annotation_old_syntax_test/*: Fail, Pass # http://dartbug.com/12635
 deferred_constraints_constants_old_syntax_test/*: Fail, Pass # http://dartbug.com/12635
 deferred_shadow_load_library_test: Fail, Pass # Issue 17807
 deferred_closurize_load_library_test: Fail, Pass # Issue 17807
 
 [ ($compiler == dart2js && $csp)]
 deferred_constraints_type_annotation_test/*: Skip # Issue 16898
 deferred_constraints_constants_test/*: Skip # Issue 16898
 deferred_no_such_method_test*: Skip # Issue 16898
 deferred_constraints_type_annotation_old_syntax_test/*: Skip # Issue 16898
 deferred_constraints_constants_old_syntax_test/*: Skip # Issue 16898
 
 [ $compiler == dart2js && $runtime == d8 && $system == windows ]
 *deferred*: Skip # Issue 17458