Disable closure wrapping by default

test/dart_codegen/expect/c/c.dart

Index: test/dart_codegen/expect/c/c.dart
diff --git a/test/dart_codegen/expect/c/c.dart b/test/dart_codegen/expect/c/c.dart
index 56cfbd9332054c0d80d3f2c1aecd1c33c2bb6fc7..285c58bfc64b51019647a2f77c634e8753837915 100644
--- a/test/dart_codegen/expect/c/c.dart
+++ b/test/dart_codegen/expect/c/c.dart
@@ -8,15 +8,10 @@ void bar() {
   f3(((__x0) => DEVC$RT.cast(__x0, dynamic, DDC$a$.A, "DynamicCast",
       """line 10, column 6 of test/dart_codegen/types/c.dart: """,
       __x0 is DDC$a$.A, true))(f4(3)));
-  f1(DEVC$RT.wrap((dynamic f(dynamic __u2)) {
-    dynamic c(dynamic x0) => ((__x1) => DEVC$RT.cast(__x1, dynamic, DDC$a$.A,
-        "CastResult",
-        """line 11, column 6 of test/dart_codegen/types/c.dart: """,
-        __x1 is DDC$a$.A, true))(f(x0));
-    return f == null ? null : c;
-  }, f4, __t5, __t3, "Wrap",
-      """line 11, column 6 of test/dart_codegen/types/c.dart: """, f4 is __t3));
+  f1(DEVC$RT.cast(f4, __t3, __t1, "CompositeCast",
+      """line 11, column 6 of test/dart_codegen/types/c.dart: """, f4 is __t1,
+      false));
   f2(f3);
 }
-typedef DDC$a$.A __t3(DDC$a$.A __u4);
-typedef dynamic __t5(dynamic __u6);
+typedef DDC$a$.A __t1(DDC$a$.A __u2);
+typedef dynamic __t3(dynamic __u4);