Remove ClassWorld.subclassesOf and ClassWorld.subtypesOf.

pkg/compiler/lib/src/universe/function_set.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 universe;
 
 // TODO(kasperl): This actually holds getters and setters just fine
 // too and stricly they aren't functions. Maybe this needs a better
 // name -- something like ElementSet seems a bit too generic.
 class FunctionSet {
@@ skipping 225 matching lines @@
   const FunctionSetQuery(this.functions);
 }
 
 class FullFunctionSetQuery extends FunctionSetQuery {
   TypeMask _mask;
 
   /**
    * Compute the type of all potential receivers of this function set.
    */
   TypeMask computeMask(ClassWorld classWorld) {
-    assert(classWorld.hasAnySubclass(classWorld.objectClass));
+    assert(classWorld.hasAnyStrictSubclass(classWorld.objectClass));
     if (_mask != null) return _mask;
     return _mask = new TypeMask.unionOf(functions
         .expand((element) {
           ClassElement cls = element.enclosingClass;
           return [cls]..addAll(classWorld.mixinUsesOf(cls));
         })
         .map((cls) {
           if (classWorld.backend.isNullImplementation(cls)) {
             return const TypeMask.empty();
           } else {
             return new TypeMask.nonNullSubclass(cls.declaration, classWorld);
           }
         }),
         classWorld);
   }
 
   FullFunctionSetQuery(functions) : super(functions);
 }