If no valid type arguments, instantate function type alias to bounds in resynthesizer.

pkg/analyzer/test/src/summary/resynthesize_common.dart

Index: pkg/analyzer/test/src/summary/resynthesize_common.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_common.dart b/pkg/analyzer/test/src/summary/resynthesize_common.dart
index ff8565665fab4806e32b6936731c5161b46f8729..fd40ab40929f0eae8292ecd11d69c0ae84c1bf1e 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_common.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_common.dart
@@ -3867,6 +3867,13 @@ C c;
 ''');
   }
 
+  test_instantiateToBounds_functionTypeAlias_simple() {
+    checkLibrary('''
+typedef F<T extends num>(T p);
+F f;
+''');
+  }
+
   test_instantiateToBounds_simple() {
     checkLibrary('''
 class C<T extends num> {}