Removed suppression of type_checks_in_factory_method_test on ie9, seems passing now

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 ]
 class_literal_test/01: Fail # Class literals are expression now; delete this test.
 class_literal_test/02: Fail # Class literals are expression now; delete this test.
 class_literal_test/05: Fail # Class literals are expression now; delete this test.
 class_literal_test/06: Fail # Class literals are expression now; delete this test.
 class_literal_test/07: Fail # Class literals are expression now; delete this test.
@@ skipping 288 matching lines @@
 
 
 [ $compiler == dart2js && $runtime == ie9 ]
 double_to_string_as_exponential3_test: Fail
 double_to_string_as_fixed_test: Fail
 double_to_string_as_precision3_test: Fail
 expect_test: Fail
 factory3_test: Fail
 stack_overflow_test: Fail
 stack_overflow_stacktrace_test: Fail
-type_checks_in_factory_method_test: Fail
 
 
 [ $compiler == dart2js && $runtime == safari ]
 null_pointer_exception_test: Fail # Uncaught error: Instance of 'TypeError'
 string_interpolate_npe_test: Fail # Uncaught error: Instance of 'TypeError'
 arithmetic_test: Fail # Issue: 7414
 
 
 [ $runtime == opera ]
 null_access_error_test: Fail # Issue: 7413
 string_interpolate_null_test: Fail # Issue: 7413
 call_through_null_getter_test: Fail
 closure3_test: Fail
 execute_finally3_test: Fail
 method_invocation_test: Fail
 null_pointer_exception_test: Fail
 stack_overflow_test: Fail
 stack_overflow_stacktrace_test: Fail
 string_interpolate_npe_test: Fail
 closure_call_wrong_argument_count_negative_test: Skip
 label_test: Skip