Use "Object" as the reified type of covariant override parameters.

pkg/analyzer/lib/src/dart/element/handle.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.element_handle;
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/constant/value.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/type.dart';
@@ skipping 391 matching lines @@
   Source get source => actualElement.source;
 
   @override
   CompilationUnit get unit => actualElement.unit;
 
   @override
   bool operator ==(Object object) =>
       object is Element && object.location == _location;
 
   @override
-  /*=T*/ accept/*<T>*/(ElementVisitor<dynamic/*=T*/> visitor) =>
+  /*=T*/ accept/*<T>*/(ElementVisitor<dynamic/*=T*/ > visitor) =>
       actualElement.accept(visitor);
 
   @override
   String computeDocumentationComment() => documentationComment;
 
   @override
   AstNode computeNode() => actualElement.computeNode();
 
   @override
   Element/*=E*/ getAncestor/*<E extends Element >*/(
@@ skipping 445 matching lines @@
   ClassElement get enclosingElement => super.enclosingElement as ClassElement;
 
   @override
   bool get isStatic => actualElement.isStatic;
 
   @override
   ElementKind get kind => ElementKind.METHOD;
 
   @override
   MethodDeclaration computeNode() => actualElement.computeNode();
+
+  @override
+  FunctionType getReifiedType(DartType objectType) =>
+      actualElement.getReifiedType(objectType);
 }
 
 /**
  * A handle to a [ParameterElement].
  */
 class ParameterElementHandle extends VariableElementHandle
     with ParameterElementMixin
     implements ParameterElement {
   /**
    * Initialize a newly created element handle to represent the element at the
@@ skipping 228 matching lines @@
 
   @override
   bool get isStatic => actualElement.isStatic;
 
   @override
   DartType get type => actualElement.type;
 
   @override
   DartObject computeConstantValue() => actualElement.computeConstantValue();
 }