Add new CefDisplayHandler::OnFaviconURLChange callback (issue #779).

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk@1013 5089003a-bbd8-11dd-ad1f-f1f9622dbc98
Allow empty |browser| parameter to CefSchemeHandlerFactory::Create (issue #834).

git-svn-id: http://chromiumembedded.googlecode.com/svn/trunk@1015 5089003a-bbd8-11dd-ad1f-f1f9622dbc98