Use WorldImpact for element dependencies in deferred_load

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

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 part of js_backend;
 
 const VERBOSE_OPTIMIZER_HINTS = false;
 
 class JavaScriptItemCompilationContext extends ItemCompilationContext {
   final Set<HInstruction> boundsChecked = new Set<HInstruction>();
@@ skipping 2792 matching lines @@
   }
 }
 
 class JavaScriptResolutionCallbacks extends ResolutionCallbacks {
   final JavaScriptBackend backend;
 
   JavaScriptResolutionCallbacks(this.backend);
 
   BackendImpacts get impacts => backend.impacts;
 
-  WorldImpact transformImpact(ResolutionWorldImpact worldImpact) {
+  WorldImpact transformImpact(ResolutionImpact worldImpact) {
     TransformedWorldImpact transformed =
         new TransformedWorldImpact(worldImpact);
     for (Feature feature in worldImpact.features) {
       switch (feature) {
         case Feature.ABSTRACT_CLASS_INSTANTIATION:
           registerBackendImpact(
               transformed, impacts.abstractClassInstantiation);
           break;
         case Feature.ASSERT:
           registerBackendImpact(transformed, impacts.assertWithoutMessage);
@@ skipping 193 matching lines @@
 }
 
 /// Records that [constant] is used by the element behind [registry].
 class Dependency {
   final ConstantValue constant;
   final Element annotatedElement;
 
   const Dependency(this.constant, this.annotatedElement);
 }