dart2dart: Support for all constants in new backend.

tests/language/reify_typevar_test.dart

Index: tests/language/reify_typevar_test.dart
diff --git a/tests/compiler/dart2js_extra/16407_test.dart b/tests/language/reify_typevar_test.dart
similarity index 58%
copy from tests/compiler/dart2js_extra/16407_test.dart
copy to tests/language/reify_typevar_test.dart
index aff1ba337ddab1eb5d219ac635653b48d4f8d1bc..32306c320c23079b65cfc60eb33498406e0761e2 100644
--- a/tests/compiler/dart2js_extra/16407_test.dart
+++ b/tests/language/reify_typevar_test.dart
@@ -4,13 +4,17 @@
 
 import "package:expect/expect.dart";
 
-// Regression test for Issue 16407.
+class Foo<T> {
+    reify() {
+        return T;
+    }
+}
 
-void main() {
-  foo(null, true);
-  foo('x', false);
+baz() {
+    return Foo;
 }
 
-var foo = (x, result) {
-  Expect.equals(result, x is Null, '$x is Null');
-};
+main() {
+    Expect.equals(int, new Foo<int>().reify());
+    Expect.equals("Foo", baz().toString());
+}