Tools/DumpRenderTree/ForwardingHeaders and Tools/TestWebKitAPI/ForwardingHeaders can be removed. Unfortunately it looks like Tools/DumpRenderTree/TestNetscapePlugin/ForwardingHeaders might be needed. Still looking into how that can be removed.
Created attachment 333850 [details] Patch
<rdar://problem/37554613>
Comment on attachment 333850 [details] Patch Clearing flags on attachment: 333850 Committed r228498: <https://trac.webkit.org/changeset/228498>
All reviewed patches have been landed. Closing bug.