WebContent: Add missing LibGfx include

Userland/Services/WebContent/WebDriverConnection.h

@@ -12,6 +12,7 @@
 #include <AK/Function.h>
 #include <AK/HashMap.h>
 #include <AK/String.h>
+#include <LibGfx/Rect.h>
 #include <LibIPC/ConnectionToServer.h>
 #include <LibJS/Forward.h>
 #include <LibJS/Heap/MarkedVector.h>