LibWeb+UI+WebContent: Pipe pinch events from AppKit UI to WebContent

Author: https://github.com/kalenikaliaksandr
Commit: c630de17ab
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/6430
Reviewed-by: https://github.com/gmta
Reviewed-by: https://github.com/konradekk

Libraries/LibWebView/ViewImplementation.cpp

@@ -214,6 +214,9 @@ void ViewImplementation::enqueue_input_event(Web::InputEvent event)
             cloned_event.files = move(event.files);
 
             client().async_drag_event(m_client_state.page_index, cloned_event);
+        },
+        [this](Web::PinchEvent const& event) {
+            client().async_pinch_event(m_client_state.page_index, event);
         });
 }