Remove tracking of factories used with type arguments.

pkg/compiler/lib/src/enqueue.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 dart2js;
 
 typedef ItemCompilationContext ItemCompilationContextCreator();
 
 class EnqueueTask extends CompilerTask {
   final ResolutionEnqueuer resolution;
@@ skipping 551 matching lines @@
 
   void registerIsCheck(DartType type, Registry registry) {
     type = universe.registerIsCheck(type, compiler);
     // 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.kind != TypeKind.TYPE_VARIABLE ||
            !type.element.enclosingElement.isTypedef);
   }
 
-  /**
-   * If a factory constructor is used with type arguments, we lose track
-   * which arguments could be used to create instances of classes that use their
-   * type variables as expressions, so we have to remember if we saw such a use.
-   */
-  void registerFactoryWithTypeArguments(Registry registry) {
-    universe.usingFactoryWithTypeArguments = true;
-  }
-
   void registerCallMethodWithFreeTypeVariables(
       Element element,
       Registry registry) {
     compiler.backend.registerCallMethodWithFreeTypeVariables(
         element, this, registry);
     universe.callMethodsWithFreeTypeVariables.add(element);
   }
 
   void registerClosurizedMember(Element element, Registry registry) {
     assert(element.isInstanceMember);
@@ skipping 317 matching lines @@
   void processWorkItem(void f(WorkItem work), WorkItem work) {
     f(work);
   }
 }
 
 void removeFromSet(Map<String, Set<Element>> map, Element element) {
   Set<Element> set = map[element.name];
   if (set == null) return;
   set.remove(element);
 }