Remove most remaining platform-specific code from Clipboard class
Created attachment 209051 [details] Patch
Woo.
Comment on attachment 209051 [details] Patch Attachment 209051 [details] did not pass gtk-ews (gtk): Output: http://webkit-queues.appspot.com/results/1512134
GTK build failure seems to be because the GTK EWS bot did not understand the file removal part of the patch.
Committed r154262: <http://trac.webkit.org/changeset/154262>