[webkit-dev] Removing obsolete File attributes

[Alexey Proskuryakov]

I'd like to remove old File object properties that are superseded in current spec versions, and have been already removed from Firefox: <https://bugs.webkit.org/show_bug.cgi?id=79383>.

Would any ports want to keep these under a feature flag, or to have some time to investigate possible consequences of the removal for port specific content?

- WBR, Alexey Proskuryakov