Test and fix resynthesized FunctionTypeImpl type args/params.

pkg/analyzer/lib/src/dart/element/type.dart

Index: pkg/analyzer/lib/src/dart/element/type.dart
diff --git a/pkg/analyzer/lib/src/dart/element/type.dart b/pkg/analyzer/lib/src/dart/element/type.dart
index b0e67d0b94b8f496dde7544c68f46a3621a7a624..03c361d8fe1815d3686e0b962296c22ec350d5ef 100644
--- a/pkg/analyzer/lib/src/dart/element/type.dart
+++ b/pkg/analyzer/lib/src/dart/element/type.dart
@@ -202,7 +202,7 @@ class FunctionTypeImpl extends TypeImpl implements FunctionType {
    */
   FunctionTypeImpl.elementWithNameAndArgs(
       Element element, String name, List<DartType> typeArguments)
-      : this._(element, name, null, typeArguments, false);
+      : this._(element, name, null, typeArguments, true);
 
   /**
    * Initialize a newly created function type to be declared by the given