Move some WebKit code related to WebKit process extensions to WebKit framework.
<rdar://problem/118776213>
Pull request: https://github.com/WebKit/WebKit/pull/20879
Committed 271280@main (f120e428c649): <https://commits.webkit.org/271280@main> Reviewed commits have been landed. Closing PR #20879 and removing active labels.
Re-opened since this is blocked by bug 265530
Pull request: https://github.com/WebKit/WebKit/pull/21058
Committed 271326@main (c0b5c33fb5e3): <https://commits.webkit.org/271326@main> Reviewed commits have been landed. Closing PR #21058 and removing active labels.
Re-opening for pull request https://github.com/WebKit/WebKit/pull/21108
Committed 271343@main (c49191c6033b): <https://commits.webkit.org/271343@main> Reviewed commits have been landed. Closing PR #21108 and removing active labels.
Reverted in https://commits.webkit.org/271343@main since it broke a build.
Pull request: https://github.com/WebKit/WebKit/pull/21140
Committed 271478@main (676f48d6af5f): <https://commits.webkit.org/271478@main> Reviewed commits have been landed. Closing PR #21140 and removing active labels.
Re-opened since this is blocked by bug 265795
Pull request: https://github.com/WebKit/WebKit/pull/21286
Committed 271502@main (b523a179f5bb): <https://commits.webkit.org/271502@main> Reviewed commits have been landed. Closing PR #21286 and removing active labels.