Register mixin use from modelz.

pkg/compiler/lib/src/resolution/registry.dart

Index: pkg/compiler/lib/src/resolution/registry.dart
diff --git a/pkg/compiler/lib/src/resolution/registry.dart b/pkg/compiler/lib/src/resolution/registry.dart
index 7de89c24ca02d54b4515e6120af93e48ddf21077..6d56c8e64bb3c058c0facee20783b7da87833ee8 100644
--- a/pkg/compiler/lib/src/resolution/registry.dart
+++ b/pkg/compiler/lib/src/resolution/registry.dart
@@ -22,7 +22,6 @@ import '../universe/selector.dart' show Selector;
 import '../universe/use.dart' show DynamicUse, StaticUse, TypeUse;
 import '../universe/world_impact.dart' show WorldImpact, WorldImpactBuilder;
 import '../util/enumset.dart' show EnumSet;
-import '../world.dart' show World;
 
 import 'send_structure.dart';
 
@@ -170,10 +169,6 @@ class ResolutionRegistry extends Registry {
 
   bool get isForResolution => true;
 
-  ResolutionEnqueuer get world => compiler.enqueuer.resolution;
-
-  World get universe => compiler.world;
-
   Backend get backend => compiler.backend;
 
   String toString() => 'ResolutionRegistry for ${mapping.analyzedElement}';
@@ -399,11 +394,6 @@ class ResolutionRegistry extends Registry {
     return backend.defaultSuperclass(element);
   }
 
-  void registerMixinUse(
-      MixinApplicationElement mixinApplication, ClassElement mixin) {
-    universe.registerMixinUse(mixinApplication, mixin);
-  }
-
   void registerInstantiation(InterfaceType type) {
     worldImpact.registerTypeUse(new TypeUse.instantiation(type));
   }