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This CL introduces new AppType, called LACROS, and annotate it
to the Lacros windows.

      Ran tast run ${DUTIP} lacros*

Bug: 1090663
Test: Ran locally, and made sure AppType is annotated.
Change-Id: I56c38ed03a655de8870fad298b962656f2b6156f
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2449830
Commit-Queue: Hidehiko Abe <hidehiko@chromium.org>
Reviewed-by: Jun Mukai <mukai@chromium.org>
Reviewed-by: James Cook <jamescook@chromium.org>
Cr-Commit-Position: refs/heads/master@{#815431}