Context menus should not offer the "Download video" option for videos that cannot be downloaded
<rdar://problem/18919130>
Created attachment 241484 [details] WIP patch
Created attachment 241517 [details] Patch I took over this patch from Eric. Eric wanted to write a test, but I don't think it is possible to capture this with a layout test. oncontextmenu will allow you to override the context menu action, but it doesn't let you see what is in the default menu. I also made one small change that should keep GTK building.
Thanks Tim! http://trac.webkit.org/changeset/176108
*** Bug 138734 has been marked as a duplicate of this bug. ***