IMPLEMENT_CLASS(wxProtoInfo) wasn't compiled in in this build configuration
because it was in url.cpp instead of protocol.cpp and so was guarded by
wxUSE_URL and not wxUSE_PROTOCOL as it should have been.
Closes#11151.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61774 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775