Use entities in impact transformers.

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

 // Copyright (c) 2017, 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 world_builder;
 
 /// [ResolutionEnqueuerWorldBuilder] based on the [Element] model.
 class ElementResolutionWorldBuilder extends ResolutionWorldBuilderBase {
   /// Used for testing the new more precise computation of instantiated types
   /// and classes.
@@ skipping 72 matching lines @@
     type.computeUnaliased(_resolution);
     type = type.unaliased;
     // Even in checked mode, type annotations for return type and argument
     // types do not imply type checks, so there should never be a check
     // against the type variable of a typedef.
     assert(!type.isTypeVariable || !type.element.enclosingElement.isTypedef);
     super.registerIsCheck(type);
   }
 
   void registerStaticUse(StaticUse staticUse, MemberUsedCallback memberUsed) {
-    if (staticUse.kind == StaticUseKind.CLOSURE) {
-      LocalFunctionElement localFunction = staticUse.element;
-      if (localFunction.type.containsTypeVariables) {
-        localFunctionsWithFreeTypeVariables.add(localFunction);
-      }
-      localFunctions.add(staticUse.element);
-      return;
-    }
-    MemberElement element = staticUse.element;
+    Element element = staticUse.element;
     assert(invariant(element, element.isDeclaration,
         message: "Element ${element} is not the declaration."));
     super.registerStaticUse(staticUse, memberUsed);
   }
 
   _ClassUsage _createClassUsage(ClassElement cls) {
     cls.ensureResolved(_resolution);
     _resolution.ensureClassMembers(cls);
     return super._createClassUsage(cls);
   }
@@ skipping 139 matching lines @@
     }
   }
 
   @override
   void registerMixinUse(
       MixinApplicationElement mixinApplication, ClassElement mixin) {
     assert(mixin.isDeclaration);
     super.registerMixinUse(mixinApplication, mixin);
   }
 }