Revert "dart2js: Pass type information to constructor rather than add later."

pkg/compiler/lib/src/ssa/codegen.dart

Index: pkg/compiler/lib/src/ssa/codegen.dart
diff --git a/pkg/compiler/lib/src/ssa/codegen.dart b/pkg/compiler/lib/src/ssa/codegen.dart
index 6faf0b401400a35872cb824e1c11e37e1418890b..abd0314aa45d4ca41cd3399deef69fe4e94f619a 100644
--- a/pkg/compiler/lib/src/ssa/codegen.dart
+++ b/pkg/compiler/lib/src/ssa/codegen.dart
@@ -1943,7 +1943,12 @@ class SsaCodeGenerator implements HVisitor, HBlockInformationVisitor {
     if (node.element.isClosure) {
       registry.registerInstantiatedClass(node.element);
     }
-    node.instantiatedTypes?.forEach(registry.registerInstantiation);
+    if (node.instantiatedTypes == null) {
+      return;
+    }
+    node.instantiatedTypes.forEach((type) {
+      registry.registerInstantiation(type);
+    });
   }
 
   js.Expression newLiteralBool(