Represent runtime type information as nested lists.

sdk/lib/_internal/compiler/implementation/js_backend/constant_emitter.dart

Index: sdk/lib/_internal/compiler/implementation/js_backend/constant_emitter.dart
diff --git a/sdk/lib/_internal/compiler/implementation/js_backend/constant_emitter.dart b/sdk/lib/_internal/compiler/implementation/js_backend/constant_emitter.dart
index 1b8992a0a158e5fd65054f1dd5947119949d6118..c5a85ca40257650227bea9c3424ad17011e47067 100644
--- a/sdk/lib/_internal/compiler/implementation/js_backend/constant_emitter.dart
+++ b/sdk/lib/_internal/compiler/implementation/js_backend/constant_emitter.dart
@@ -300,19 +300,13 @@ class ConstantInitializerEmitter implements ConstantVisitor<js.Expression> {
     String helperName = backend.namer.getName(helper);
     DartType type = constant.representedType;
     Element element = type.element;
-    String typeName;
-    if (type.kind == TypeKind.INTERFACE) {
-      typeName =
-          backend.rti.getStringRepresentation(type, expandRawType: true);
-    } else {
-      assert(type.kind == TypeKind.TYPEDEF);
-      typeName = element.name.slowToString();
-    }
+    String name = backend.rti.getRawTypeRepresentation(type);
+    js.Expression typeName = new js.LiteralString("'$name'");
     return new js.Call(
         new js.PropertyAccess.field(
             new js.VariableUse(namer.CURRENT_ISOLATE),
             helperName),
-        [new js.LiteralString("'$typeName'")]);
+        [typeName]);
   }
 
   js.Expression visitConstructed(ConstructedConstant constant) {