ColorMac creates GraphicsContextCG only to set CGContext as the NSGraphicsContext
<rdar://problem/116241128>
Pull request: https://github.com/WebKit/WebKit/pull/18418
Committed 268842@main (af33ec387361): <https://commits.webkit.org/268842@main> Reviewed commits have been landed. Closing PR #18418 and removing active labels.
Re-opened since this is blocked by bug 262624
Pull request: https://github.com/WebKit/WebKit/pull/18677
Committed 269197@main (765dffe2f0df): <https://commits.webkit.org/269197@main> Reviewed commits have been landed. Closing PR #18677 and removing active labels.