Add support for web-platform-test custom domains when running layout tests with WebKitTestRunner on Cocoa ports.
Pull request: https://github.com/WebKit/WebKit/pull/4438
<rdar://problem/100337257>
Pull request: https://github.com/WebKit/WebKit/pull/7894
We've closed all the PRs linked here, and I believe we're going down the path of bug 261038 instead. *** This bug has been marked as a duplicate of bug 261038 ***