GitLab

overview: Move some tests.

Moves a couple non-splitview tests from SplitViewOverviewSessionTest
to TabletOverviewSessionTest. This has less setup and functions, it
works well enough for the moved tests.

Test: ash_unittests
Bug: none
Change-Id: I6874fa8906895f8dc3279a3918544ad582f756c6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2053085
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Avery Musbach <amusbach@chromium.org>
Cr-Commit-Position: refs/heads/master@{#741206}