Implement correct scoping rules for variables.

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 f118e5323900b8b49bf1f252d9829885733fd730..de023fa6b118dfc3f640babb6c0c657ee6939a25 100644
--- a/tests/co19/co19-dart2js.status
+++ b/tests/co19/co19-dart2js.status
@@ -163,6 +163,11 @@ LibTest/core/RegExp/Pattern_semantics/firstMatch_Term_A04_t01: RuntimeError, OK
 #
 [ $compiler == dart2js ]
 Language/03_Overview/2_Privacy_A01_t09: RuntimeError, OK # co19 issue 198
+Language/13_Statements/04_Local_Function_Declaration_A02_t02: CompileTimeError, OK # co19 issue 602.
+Language/13_Statements/03_Variable_Declaration_A01_t16: CompileTimeError, OK # co19 issue 602.
+Language/13_Statements/03_Variable_Declaration_A01_t09: CompileTimeError, OK # co19 issue 602.
+Language/05_Variables/05_Variables_A11_t01: CompileTimeError, OK # co19 issue 602.
+
 Language/03_Overview/2_Privacy_A01_t11: Pass, OK # co19 issue 316
 Language/06_Functions/4_External_Functions_A01_t01: CompileTimeError, OK # http://dartbug.com/5021
 LibTest/core/int/hashCode_A01_t01: RuntimeError, OK # co19 issue 308