Compute mixin application constructors in the ClassElement.constructors getter.

pkg/analyzer/lib/src/generated/element_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 engine.resolver.element_resolver;
 
 import 'dart:collection';
 
 import 'ast.dart';
 import 'element.dart';
@@ skipping 1031 matching lines @@
     InterfaceType superType = enclosingClass.supertype;
     if (superType == null) {
       // TODO(brianwilkerson) Report this error.
       return null;
     }
     SimpleIdentifier name = node.constructorName;
     String superName = name != null ? name.name : null;
     ConstructorElement element =
         superType.lookUpConstructor(superName, _definingLibrary);
     if (element == null ||
-        (!enclosingClass.mixinErrorsReported &&
+        (!enclosingClass.doesMixinLackConstructors &&
             !enclosingClass.isSuperConstructorAccessible(element))) {
       if (name != null) {
         _resolver.reportErrorForNode(
             CompileTimeErrorCode.UNDEFINED_CONSTRUCTOR_IN_INITIALIZER, node, [
           superType.displayName,
           name
         ]);
       } else {
         _resolver.reportErrorForNode(
             CompileTimeErrorCode.UNDEFINED_CONSTRUCTOR_IN_INITIALIZER_DEFAULT,
@@ skipping 1740 matching lines @@
 
   @override
   Element get staticElement => null;
 
   @override
   accept(AstVisitor visitor) => null;
 
   @override
   void visitChildren(AstVisitor visitor) {}
 }