WebCore should use unified sources to build files.
Created attachment 322992 [details]
Works locally for Mac/iOS Xcode. Now I need to rebase and get CMake to work.
As a note, on my MBP it takes just the WebCore part of my build from ~25-26min to ~9min.
Created attachment 323471 [details]
Rebasing is super annoying. I think I'm going to take Alex's advice and do this piecewise...
As of https://trac.webkit.org/changeset/224123. This is pretty much done.