GitLab

clang r370594 added a warning on non-final classes with final dtors.
One plugin test has code like this; just add final to these classes.

TBR=dcheng

Bug: 999869
Change-Id: I0eff3f561530b28855f21fd0c0e421613e86aa58
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1778974Reviewed-by: Nico Weber <thakis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#692384}