Simplify runtime type support.

tests/co19/co19-dart2js.status

Index: tests/co19/co19-dart2js.status
diff --git a/tests/co19/co19-dart2js.status b/tests/co19/co19-dart2js.status
index 3c83972eefba1b81e69c5205f22c41f0034cb91e..d53262431445830693e2d05b51ce19865129968b 100644
--- a/tests/co19/co19-dart2js.status
+++ b/tests/co19/co19-dart2js.status
@@ -728,8 +728,6 @@ Language/11_Expressions/15_Method_Invocation/3_Static_Invocation_A03_t06: Fail #
 
 Language/14_Types/2_Dynamic_Type_System_A02_t01: Fail # http://dartbug.com/5029
 
-Language/03_Overview/03_Overview_A01_t01: Fail # http://dartbug.com/3903
-
 Language/07_Classes/3_Setters_A04_t01: Fail # http://dartbug.com/5023
 Language/07_Classes/3_Setters_A04_t02: Fail # http://dartbug.com/5023
 Language/07_Classes/3_Setters_A04_t03: Fail # http://dartbug.com/5023
@@ -781,7 +779,6 @@ Language/07_Classes/07_Classes_A03_t10: Fail # http://dartbug.com/6687
 [ $compiler == dart2js ]
 Language/14_Types/5_Function_Types_A02_t01: Fail # Expect.isTrue(false) fails.
 
-Language/14_Types/4_Interface_Types_A05_t03: Fail # http://dartbug.com/5020
 Language/14_Types/4_Interface_Types_A08_t06: Fail # http://dartbug.com/5020
 Language/14_Types/4_Interface_Types_A10_t01: Fail # http://dartbug.com/5020
 Language/14_Types/4_Interface_Types_A10_t02: Fail # http://dartbug.com/5020