This mime type is used for navigation tasks. If going through Service Worker, the mime type would not be set now.
Created attachment 326457 [details] Patch
Created attachment 326459 [details] Patch
Comment on attachment 326459 [details] Patch View in context: https://bugs.webkit.org/attachment.cgi?id=326459&action=review > Source/WebCore/platform/network/ResourceResponseBase.h:82 > + void sniffMimeTypeIfNeeded(const String& contentType); Not a fan of having a sniffing method on the resourceResponse itself.
Created attachment 326478 [details] Patch
Comment on attachment 326478 [details] Patch Clearing flags on attachment: 326478 Committed r224645: <https://trac.webkit.org/changeset/224645>
All reviewed patches have been landed. Closing bug.
<rdar://problem/35562115>