Do not add type information to constants with constructor taking type information

pkg/compiler/lib/src/js_backend/constant_emitter.dart

Index: pkg/compiler/lib/src/js_backend/constant_emitter.dart
diff --git a/pkg/compiler/lib/src/js_backend/constant_emitter.dart b/pkg/compiler/lib/src/js_backend/constant_emitter.dart
index e30ef91bc4d213699020c50008785c3171918a69..31bcccb9c0971aedf79d8526944f2af21ce27a68 100644
--- a/pkg/compiler/lib/src/js_backend/constant_emitter.dart
+++ b/pkg/compiler/lib/src/js_backend/constant_emitter.dart
@@ -315,7 +315,7 @@ class ConstantEmitter implements ConstantValueVisitor<jsAst.Expression, Null> {
       fields.add(_reifiedTypeArguments(constant.type));
     }
     jsAst.New instantiation = new jsAst.New(constructor, fields);
-    return maybeAddTypeArguments(constant.type, instantiation);
+    return instantiation;

[Siggi Cherem (dart-lang), 2016/09/16 18:39:02]

to clarify: is this because the type-information is already passed into the
constructor, so we were practically setting it twice?

[sra1, 2016/09/16 20:09:08]

Exactly. Line 315.

   }
 
   String stripComments(String rawJavaScript) {