LibWeb+UI: Add internals API to set browser zoom

Author: https://github.com/InvalidUsernameException
Commit: 5cc9a5802d
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2982
Reviewed-by: https://github.com/AtkinsSJ

Libraries/LibWebView/WebContentClient.cpp

@@ -101,6 +101,14 @@ void WebContentClient::did_set_test_timeout(u64 page_id, double milliseconds)
     }
 }
 
+void WebContentClient::did_set_browser_zoom(u64 page_id, double factor)
+{
+    if (auto view = view_for_page_id(page_id); view.has_value()) {
+        if (view->on_set_browser_zoom)
+            view->on_set_browser_zoom(factor);
+    }
+}
+
 void WebContentClient::did_find_in_page(u64 page_id, size_t current_match_index, Optional<size_t> const& total_match_count)
 {
     if (auto view = view_for_page_id(page_id); view.has_value()) {