tree 6f0f7a7e20e713b15d303caeaaf3d2134f822cad
parent 1106a5bfee1472905711da7a78dcd413ba2f6dcf
author Mike Fairhurst <mfairhurst@google.com> 1530301374 -0700
committer Mike Fairhurst <mfairhurst@google.com> 1530301374 -0700

Fix places awaiting void, for dart 2.

Looks like cache.invalidate does do some asynchronous stuff
(`splitter.close()`, but notably not `_stale.close()` which returns void).
Return the future for that stuff without changing its order of
operations.

Also some place awaiting `expect()` which appeared to be intended to be
awaiting `cancel()`, switching those still passes tests.