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1. Snap the active window in clamshell mode
2. Switch to another user session
3. Switch to tablet mode
4. Switch back to the first user session

The snapped window should be carried over to tablet split view.

Test: manual
Change-Id: I830114212b595dc44c6513e9072141cd8282dadc
Fixed: 936610
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2021187
Commit-Queue: Avery Musbach <amusbach@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#735485}