reworked find in page

packages/flutter_mozilla_components/lib/src/domain/entities/default_selection_actions.dart

@@ -60,6 +60,15 @@ class PrivateSearchAction extends BaseSelectionAction {
       );
 }
 
+class FindInPageAction extends BaseSelectionAction {
+  FindInPageAction(PerformAction action)
+    : super(
+        id: 'CUSTOM_CONTEXT_MENU_FIND_IN_PAGE',
+        title: 'Find in page',
+        performAction: action,
+      );
+}
+
 class ShareAction extends BaseSelectionAction {
   ShareAction(PerformAction action)
     : super(

packages/flutter_mozilla_components/lib/src/domain/services/gecko_find_in_page.dart

@@ -9,10 +9,6 @@ class GeckoFindInPageService {
   GeckoFindInPageService({required this.tabId, GeckoFindApi? api})
     : _api = api ?? _apiInstance;
 
-  GeckoFindInPageService.forActiveTab({GeckoFindApi? api})
-    : _api = api ?? _apiInstance,
-      tabId = null;
-
   Future<void> findAll(String text) {
     return _api.findAll(tabId, text);
   }