Create closed world for hello world using .dill file

pkg/compiler/lib/src/kernel/element_adapter.dart

Index: pkg/compiler/lib/src/kernel/element_adapter.dart
diff --git a/pkg/compiler/lib/src/kernel/element_adapter.dart b/pkg/compiler/lib/src/kernel/element_adapter.dart
index 9a40304d256db7bddb2f32bf0d22bd521f5216c5..06859669bfd550166dfc2fa250ede4e194763062 100644
--- a/pkg/compiler/lib/src/kernel/element_adapter.dart
+++ b/pkg/compiler/lib/src/kernel/element_adapter.dart
@@ -170,7 +170,7 @@ abstract class KernelElementAdapterMixin implements KernelElementAdapter {
   Selector getInvocationSelector(ir.InvocationExpression invocation) {
     Name name = getName(invocation.name);
     SelectorKind kind;
-    if (Elements.isOperatorName(invocation.name.name)) {
+    if (Selector.isOperatorName(name.text)) {
       if (name == Names.INDEX_NAME || name == Names.INDEX_SET_NAME) {
         kind = SelectorKind.INDEX;
       } else {
@@ -179,7 +179,6 @@ abstract class KernelElementAdapterMixin implements KernelElementAdapter {
     } else {
       kind = SelectorKind.CALL;
     }
-
     CallStructure callStructure = getCallStructure(invocation.arguments);
     return new Selector(kind, name, callStructure);
   }