use Unit in Pipeline
authorJames Sedgwick <jsedgwick@fb.com>
Tue, 16 Jun 2015 17:31:02 +0000 (10:31 -0700)
committerSara Golemon <sgolemon@fb.com>
Wed, 17 Jun 2015 17:26:16 +0000 (10:26 -0700)
commit1137f4b872d19547b2f76874174034ff94060cc0
tree4d62488bfca0db4be2f9ac784a06f8c5c230e73f
parentca1e87ed0a85daf3abaf2ac423266e869f3961ec
use Unit in Pipeline

Summary: Instead of the one-off Nothing struct

Reviewed By: @yfeldblum

Differential Revision: D2158621
folly/wangle/channel/Handler.h
folly/wangle/channel/Pipeline-inl.h
folly/wangle/channel/Pipeline.h