When switching from a window tree host to another, mouse should
exit the old window tree host otherwise some effects on the old
display will never exit such as hovering.
BUG=298548104
Change-Id: I2045d2b21a79f5fa3826337cfdb0876c3e303e74
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6336772
Commit-Queue: Yichen Zhou <yichenz@chromium.org>
Reviewed-by: Xiyuan Xia <xiyuan@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1429869}
92f6da2886