Fix invalid cast

pkg/analyzer/lib/src/dart/constant/value.dart

Index: pkg/analyzer/lib/src/dart/constant/value.dart
diff --git a/pkg/analyzer/lib/src/dart/constant/value.dart b/pkg/analyzer/lib/src/dart/constant/value.dart
index db4de37f8302ce08b9e49f36f2c4d778191c2976..a927df61a25e54153166a5a6ec2f78c9bf38275f 100644
--- a/pkg/analyzer/lib/src/dart/constant/value.dart
+++ b/pkg/analyzer/lib/src/dart/constant/value.dart
@@ -144,9 +144,6 @@ class DartObjectImpl implements DartObject {
    */
   static const List<DartObjectImpl> EMPTY_LIST = const <DartObjectImpl>[];
 
-  /**
-   * The run-time type of this object.
-   */
   @override
   final ParameterizedType type;
 
@@ -163,7 +160,7 @@ class DartObjectImpl implements DartObject {
   /**
    * Create an object to represent an unknown value.
    */
-  factory DartObjectImpl.validWithUnknownValue(InterfaceType type) {
+  factory DartObjectImpl.validWithUnknownValue(ParameterizedType type) {
     if (type.element.library.isDartCore) {
       String typeName = type.name;
       if (typeName == "bool") {