Rename UniverseSelector to DynamicUse and move it to use.dart

pkg/compiler/lib/src/common/registry.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.
 
 library dart2js.common.registry;
 
 import '../dart_types.dart' show
     InterfaceType;
 import '../enqueue.dart' show
     Enqueuer;
 import '../elements/elements.dart' show
     Element,
     FunctionElement;
-import '../universe/universe.dart' show
-    UniverseSelector;
 import '../universe/use.dart' show
+    DynamicUse,
     StaticUse;
 
 /// Interface for registration of element dependencies.
 abstract class Registry {
   // TODO(johnniwinther): Remove this.
   void registerDependency(Element element) {}
 
   bool get isForResolution;
 
-  void registerDynamicUse(UniverseSelector staticUse);
+  void registerDynamicUse(DynamicUse staticUse);
 
   void registerStaticUse(StaticUse staticUse);
 
   void registerInstantiation(InterfaceType type);
 }
 
 // TODO(johnniwinther): Remove this.
 class EagerRegistry extends Registry {
   final String name;
   final Enqueuer world;
 
   EagerRegistry(this.name, this.world);
 
   bool get isForResolution => world.isResolutionQueue;
 
   @override
-  void registerDynamicUse(UniverseSelector selector) {
-    world.registerDynamicUse(selector);
+  void registerDynamicUse(DynamicUse dynamicUse) {
+    world.registerDynamicUse(dynamicUse);
   }
 
   @override
   void registerInstantiation(InterfaceType type) {
     world.registerInstantiatedType(type);
   }
 
   @override
   void registerStaticUse(StaticUse staticUse) {
     world.registerStaticUse(staticUse);
   }
 
   String toString() => name;
 }