Mark leak: instances of OpacityLayer, created by _RenderChip, should be disposed. (#134395)

packages/flutter/test/material/chip_test.dart

@@ -217,7 +217,7 @@ Finder findTooltipContainer(String tooltipText) {
 }
 
 void main() {
-  testWidgets('M2 Chip defaults', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('M2 Chip defaults', (WidgetTester tester) async {
     late TextTheme textTheme;
 
     Widget buildFrame(Brightness brightness) {
@@ -292,7 +292,12 @@ void main() {
     expect(labelStyle.overflow, textTheme.bodyLarge?.overflow);
     expect(labelStyle.textBaseline, textTheme.bodyLarge?.textBaseline);
     expect(labelStyle.wordSpacing, textTheme.bodyLarge?.wordSpacing);
-  });
+  },
+  // TODO(polina-c): remove after fixing
+  // https://github.com/flutter/flutter/issues/134394
+  leakTrackingTestConfig: const LeakTrackingTestConfig(
+    notDisposedAllowList: <String, int?>{'OpacityLayer': 2},
+  ));
 
   testWidgetsWithLeakTracking('M3 Chip defaults', (WidgetTester tester) async {
     late TextTheme textTheme;