Remove the old task model

pkg/analyzer/lib/src/generated/constant.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.constant;
 
 import 'dart:collection';
 
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/utilities_general.dart';
@@ skipping 2151 matching lines @@
    * (We return the string
    */
   String toSymbolValue();
 
   /**
    * Return the representation of the type corresponding to the value of the
    * object being represented, or `null` if
    * * this object is not of type 'Type', or
    * * the value of the object being represented is `null`.
    */
-  ParameterizedType toTypeValue();
+  DartType toTypeValue();
 }
 
 /**
  * A utility class that contains methods for manipulating instances of a Dart
  * class and for collecting errors during evaluation.
  */
 class DartObjectComputer {
   /**
    * The error reporter that we are using to collect errors.
    */
@@ skipping 940 matching lines @@
 
   @override
   String toSymbolValue() {
     if (_state is SymbolState) {
       return (_state as SymbolState).value;
     }
     return null;
   }
 
   @override
-  ParameterizedType toTypeValue() {
+  DartType toTypeValue() {
     if (_state is TypeState) {
       Element element = (_state as TypeState).value;
-      if (element is ClassElement) {
-        return element.type;
-      }
-      if (element is FunctionElement) {
+      if (element is TypeDefiningElement) {
         return element.type;
       }
     }
     return null;
   }
 }
 
 /**
  * An object used to provide access to the values of variables that have been
  * defined on the command line using the `-D` option.
@@ skipping 2417 matching lines @@
       return BoolState.from(_element == rightElement);
     } else if (rightOperand is DynamicState) {
       return BoolState.UNKNOWN_VALUE;
     }
     return BoolState.FALSE_STATE;
   }
 
   @override
   String toString() => _element == null ? "-unknown-" : _element.name;
 }