GitLab

These were added for deprecated Mash architecture plans.
Inline calls to [Add/Remove]PreTargetHandler instead.

Bug: 866529
Test: No shelf tooltip nor double-click-to-resize-window changes.
Change-Id: Ic4d376652e1e128c979cfdb6f5f219a2ed76f6ad
Reviewed-on: https://chromium-review.googlesource.com/1240212Reviewed-by: James Cook <jamescook@chromium.org>
Commit-Queue: Michael Wasserman <msw@chromium.org>
Cr-Commit-Position: refs/heads/master@{#593628}