Disable the hint produced when invoking a super member that is abstract when super-in-mixins is sup…

pkg/analyzer/lib/src/generated/resolver.dart

 // Copyright (c) 2014, 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 analyzer.src.generated.resolver;
 
 import 'dart:collection';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/token.dart';
@@ skipping 406 matching lines @@
               HintCode.TYPE_CHECK_IS_NOT_NULL, node);
         }
         return true;
       }
     }
     return false;
   }
 
   void _checkForAbstractSuperMemberReference(
       Expression target, SimpleIdentifier name) {
-    if (target is SuperExpression) {
+    if (target is SuperExpression &&
+        !_currentLibrary.context.analysisOptions.enableSuperMixins) {
       Element element = name.staticElement;
       if (element is ExecutableElement && element.isAbstract) {
         if (!_enclosingClass.hasNoSuchMethod) {
           ExecutableElement concrete = null;
           if (element.kind == ElementKind.METHOD) {
             concrete = _enclosingClass.lookUpInheritedConcreteMethod(
                 element.displayName, _currentLibrary);
           } else if (element.kind == ElementKind.GETTER) {
             concrete = _enclosingClass.lookUpInheritedConcreteGetter(
                 element.displayName, _currentLibrary);
@@ skipping 10331 matching lines @@
       return null;
     }
     if (identical(node.staticElement, variable)) {
       if (node.inSetterContext()) {
         result = true;
       }
     }
     return null;
   }
 }