Register closures using StaticUse.

pkg/compiler/lib/src/common/codegen.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.codegen;
 
 import '../common.dart';
 import '../compiler.dart' show
     Compiler;
 import '../constants/values.dart' show
@@ skipping 186 matching lines @@
   void registerCompileTimeConstant(ConstantValue constant) {
     worldImpact.registerCompileTimeConstant(constant);
   }
 
   void registerTypeVariableBoundsSubtypeCheck(DartType subtype,
                                               DartType supertype) {
     worldImpact.registerTypeVariableBoundsSubtypeCheck(subtype, supertype);
   }
 
   void registerInstantiatedClosure(LocalFunctionElement element) {
-    worldImpact.registerClosure(element);
+    worldImpact.registerStaticUse(new StaticUse.closure(element));
   }
 
   void registerConstSymbol(String name) {
     worldImpact.registerConstSymbol(name);
   }
 
   void registerSpecializedGetInterceptor(Set<ClassElement> classes) {
     worldImpact.registerSpecializedGetInterceptor(classes);
   }
 
@@ skipping 41 matching lines @@
 
   TreeElements get resolutionTree => element.resolvedAst.elements;
 
   WorldImpact run(Compiler compiler, CodegenEnqueuer world) {
     if (world.isProcessed(element)) return const WorldImpact();
 
     registry = new CodegenRegistry(compiler, element);
     return compiler.codegen(this, world);
   }
 }