cookie-manager: remove pointer alias
s/webkit-cookie-manager-class/webkit-cookie-manager/g
s/webkit-download-class/webkit-download/g
s/webkit-find-controller-class/webkit-find-controller/g
s/webkit-uri-request-class/webkit-uri-request/g
s/webkit-web-view-class/webkit-web-view/g
's/webkit-web-context-class/webkit-web-context/g'
s/webit-web-context-class/webkit-web-context/g

Fixes typo