WebKitDecoder.h should include TargetConditionals.h because libwebrtc doesn't have a wtf/Platform.h equivalent.
<rdar://problem/79689776>
Created attachment 432085 [details] Patch
Committed r279187 (239082@main): <https://commits.webkit.org/239082@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 432085 [details].