Extract OrderedTypeSetBuilderBase from OrderedTypeSetBuilder

pkg/compiler/lib/src/world.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.world;
 
 import 'closure.dart' show ClosureClassElement, SynthesizedCallMethodElementX;
 import 'common/backend_api.dart' show BackendClasses;
 import 'common.dart';
 import 'constants/constant_system.dart';
 import 'common_elements.dart' show CommonElements;
 import 'elements/entities.dart';
 import 'elements/elements.dart'
     show
         ClassElement,
         Element,
         FunctionElement,
         MemberElement,
         MixinApplicationElement,
         TypedefElement;
 import 'elements/resolution_types.dart';
+import 'elements/types.dart';
 import 'js_backend/backend.dart' show JavaScriptBackend;
 import 'js_backend/interceptor_data.dart' show InterceptorData;
 import 'js_backend/native_data.dart' show NativeData;
 import 'ordered_typeset.dart';
 import 'types/masks.dart' show CommonMasks, FlatTypeMask, TypeMask;
 import 'universe/class_set.dart';
 import 'universe/function_set.dart' show FunctionSet, FunctionSetBuilder;
 import 'universe/selector.dart' show Selector;
 import 'universe/side_effects.dart' show SideEffects;
 import 'universe/world_builder.dart' show ResolutionWorldBuilder;
@@ skipping 938 matching lines @@
       assert(_checkInvariants(otherClass));
       OrderedTypeSet otherTypeSet = otherClass.allSupertypesAndSelf;
       otherTypeSets = otherTypeSets.prepend(otherTypeSet);
       if (otherTypeSet.maxDepth < depth) {
         depth = otherTypeSet.maxDepth;
       }
     } while (iterator.moveNext());
 
     List<ClassElement> commonSupertypes = <ClassElement>[];
     OUTER:
-    for (Link<ResolutionDartType> link = typeSet[depth];
+    for (Link<InterfaceType> link = typeSet[depth];
         link.head.element != commonElements.objectClass;
         link = link.tail) {
       ClassElement cls = link.head.element;
       for (Link<OrderedTypeSet> link = otherTypeSets;
           !link.isEmpty;
           link = link.tail) {
-        if (link.head.asInstanceOf(cls) == null) {
+        if (link.head.asInstanceOf(cls, cls.hierarchyDepth) == null) {
           continue OUTER;
         }
       }
       commonSupertypes.add(cls);
     }
     commonSupertypes.add(commonElements.objectClass);
     return commonSupertypes;
   }
 
   Iterable<ClassEntity> commonSubclasses(ClassEntity cls1, ClassQuery query1,
@@ skipping 214 matching lines @@
       return getMightBePassedToApply(element.expression);
     }
     return functionsThatMightBePassedToApply.contains(element);
   }
 
   @override
   bool getCurrentlyKnownMightBePassedToApply(Element element) {
     return getMightBePassedToApply(element);
   }
 }