Allow private selectors to be typed, and fix ClassElement.isSubclassOf to take patches into account.

sdk/lib/_internal/compiler/implementation/universe/universe.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 universe;
 
 import '../closure.dart';
 import '../elements/elements.dart';
 import '../dart2jslib.dart';
 import '../dart_types.dart';
@@ skipping 435 matching lines @@
             selector.namedArguments) {
     // Invariant: Typed selector can not be based on a malformed type.
     assert(!identical(receiverType.kind, TypeKind.MALFORMED_TYPE));
   }
 
   /**
    * Check if [element] will be the one used at runtime when being
    * invoked on an instance of [cls].
    */
   bool hasElementIn(ClassElement cls, Element element) {
-    Element resolved = cls.lookupMember(element.name);
-    if (identical(resolved, element)) return true;
+    // Use the selector for the lookup instead of [:element.name:]
+    // because the selector has the right privacy information.
+    Element resolved = cls.lookupSelector(this);
+    if (resolved == element) return true;
     if (resolved == null) return false;
-    if (identical(resolved.kind, ElementKind.ABSTRACT_FIELD)) {
+    if (resolved.isAbstractField()) {
       AbstractFieldElement field = resolved;
-      if (identical(element, field.getter) || identical(element, field.setter)) {
+      if (element == field.getter || element == field.setter) {
         return true;
       } else {
         ClassElement otherCls = field.getEnclosingClass();
         // We have not found a match, but another class higher in the
         // hierarchy may define the getter or the setter.
         return hasElementIn(otherCls.superclass, element);
       }
     }
     return false;
   }
@@ skipping 32 matching lines @@
     ClassElement cls = self;
     if (cls.isSubclassOf(other)) {
       // Resolve an invocation of [element.name] on [self]. If it
       // is found, this selector is a candidate.
       return hasElementIn(self, element) && appliesUntyped(element, compiler);
     }
 
     return false;
   }
 }