Check result type of redirecting factory in checked mode.

tests/language/language_dart2js.status

Index: tests/language/language_dart2js.status
===================================================================
--- tests/language/language_dart2js.status	(revision 14858)
+++ tests/language/language_dart2js.status	(working copy)
@@ -69,6 +69,8 @@
 [ $compiler == dart2js && $unchecked ]
 assertion_test: Fail
 new_expression_type_args_test/02: Fail # Test does not conform with spec.
+factory_redirection_test/08: Fail
+factory_redirection_test/09: Fail
 
 # Only checked mode reports an error on type assignment
 # problems in compile time constants.
@@ -88,12 +90,12 @@
 
 [ $compiler == dart2js ]
 arithmetic_test: Fail # http://dartbug.com/6627
-factory_redirection_test/none: fail
-factory_redirection_test/01: fail
-factory_redirection_test/02: fail
-factory_redirection_test/03: fail
-factory_redirection_test/05: fail
-factory_redirection_test/06: fail
+factory_redirection_test/none: Fail
+factory_redirection_test/01: Fail
+factory_redirection_test/02: Fail
+factory_redirection_test/03: Fail
+factory_redirection_test/05: Fail
+factory_redirection_test/06: Fail
 final_variable_assignment_test/01: Fail
 final_variable_assignment_test/02: Fail
 final_variable_assignment_test/03: Fail