Improve memory safety in SandboxInitializationParameters by using ASCIILiteral and CString more.
Pull request: https://github.com/WebKit/WebKit/pull/29224
Committed 279450@main (c916962d69eb): <https://commits.webkit.org/279450@main> Reviewed commits have been landed. Closing PR #29224 and removing active labels.
<rdar://problem/128953708>