Runtime fixes on DDC tests

pkg/dev_compiler/test/codegen/language/map_literal5_test.dart

Index: pkg/dev_compiler/test/codegen/language/map_literal5_test.dart
diff --git a/pkg/dev_compiler/test/codegen/language/map_literal5_test.dart b/pkg/dev_compiler/test/codegen/language/map_literal5_test.dart
index 365f2189ba11b5fedb4701612fc8fbf491a89bca..0c2fa171a1c5cd909d49ec2348afbc5562b9ff70 100644
--- a/pkg/dev_compiler/test/codegen/language/map_literal5_test.dart
+++ b/pkg/dev_compiler/test/codegen/language/map_literal5_test.dart
@@ -32,7 +32,7 @@ void test(bool b) {
   }
 }
 
-create(bool b) {
+Map create(bool b) {
   return {
     b: 0,
     m(b): n(b),
@@ -40,5 +40,5 @@ create(bool b) {
   };
 }
 
-m(bool b) => b ? 2 : "bar";
-n(bool b) => b ? 3 : "baz";
+Object m(bool b) => b ? 2 : "bar";
+Object n(bool b) => b ? 3 : "baz";