Support user class in compile_from_dill_test

pkg/compiler/lib/src/universe/resolution_world_builder.dart

Index: pkg/compiler/lib/src/universe/resolution_world_builder.dart
diff --git a/pkg/compiler/lib/src/universe/resolution_world_builder.dart b/pkg/compiler/lib/src/universe/resolution_world_builder.dart
index b45c1c91c8accb2274d9333ef5a4d98c810b38dd..0b02e4555d594459d085a2c40441af5b25574a25 100644
--- a/pkg/compiler/lib/src/universe/resolution_world_builder.dart
+++ b/pkg/compiler/lib/src/universe/resolution_world_builder.dart
@@ -931,6 +931,8 @@ abstract class ResolutionWorldBuilderBase
 
 abstract class KernelResolutionWorldBuilderBase
     extends ResolutionWorldBuilderBase {
+  KernelToElementMapImpl get elementMap;
+
   KernelResolutionWorldBuilderBase(
       ElementEnvironment elementEnvironment,
       CommonElements commonElements,
@@ -959,7 +961,8 @@ abstract class KernelResolutionWorldBuilderBase
         _classHierarchyNodes.length == _classSets.length,
         "ClassHierarchyNode/ClassSet mismatch: "
         "$_classHierarchyNodes vs $_classSets");
-    return _closedWorldCache = new KernelClosedWorld(
+    return _closedWorldCache = new KernelClosedWorld(elementMap,
+        elementEnvironment: _elementEnvironment,
         commonElements: _commonElements,
         nativeData: _nativeDataBuilder.close(),
         interceptorData: _interceptorDataBuilder.close(),