Do not emit type metadata for classes that are only emitted for rti.

pkg/compiler/lib/src/js_emitter/full_emitter/class_emitter.dart

Index: pkg/compiler/lib/src/js_emitter/full_emitter/class_emitter.dart
diff --git a/pkg/compiler/lib/src/js_emitter/full_emitter/class_emitter.dart b/pkg/compiler/lib/src/js_emitter/full_emitter/class_emitter.dart
index 5a84ef2252aa13ae986dc5f381bd95ffd039f2de..cb03c3e0ef794509a702fe915b4661c99e6ac7c7 100644
--- a/pkg/compiler/lib/src/js_emitter/full_emitter/class_emitter.dart
+++ b/pkg/compiler/lib/src/js_emitter/full_emitter/class_emitter.dart
@@ -341,7 +341,7 @@ class ClassEmitter extends CodeEmitterHelper {
 
     String reflectionName = emitter.getReflectionName(classElement, className);
     if (reflectionName != null) {
-      if (!backend.isAccessibleByReflection(classElement)) {
+      if (!backend.isAccessibleByReflection(classElement) || cls.onlyForRti) {
         // TODO(herhut): Fix use of reflection name here.
         enclosingBuilder.addPropertyByName("+$reflectionName", js.number(0));
       } else {