[Fetch API] Add a JS builtin to implement https://fetch.spec.whatwg.org/#concept-headers-fill
Created attachment 284033 [details] Patch
Created attachment 284038 [details] Adding missing file
Comment on attachment 284038 [details] Adding missing file Clearing flags on attachment: 284038 Committed r203445: <http://trac.webkit.org/changeset/203445>
All reviewed patches have been landed. Closing bug.