Fix for dynamic instance field reference highlighting.

pkg/analysis_server/test/analysis/notification_highlights_test2.dart

Index: pkg/analysis_server/test/analysis/notification_highlights_test2.dart
diff --git a/pkg/analysis_server/test/analysis/notification_highlights_test2.dart b/pkg/analysis_server/test/analysis/notification_highlights_test2.dart
index 002bb1b9dacc63bff04cccafcf12ff0586bb3cd0..f6194dcd1a9d6c2b23c8e13872aba83c91e2a9a3 100644
--- a/pkg/analysis_server/test/analysis/notification_highlights_test2.dart
+++ b/pkg/analysis_server/test/analysis/notification_highlights_test2.dart
@@ -731,6 +731,19 @@ main(A a) {
     });
   }
 
+  test_INSTANCE_FIELD_dynamic() {
+    addTestFile('''
+class A {
+  var f;
+  A(this.f);
+}
+''');
+    return prepareHighlights().then((_) {
+      assertHasRegion(HighlightRegionType.INSTANCE_FIELD_DECLARATION, 'f;');
+      assertHasRegion(HighlightRegionType.INSTANCE_FIELD_REFERENCE, 'f);');
+    });
+  }
+
   test_KEYWORD() {
     addTestFile('''
 main() {