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The geometry sent to the client is in screen coordinates in DP, as
opposed to the display's coordinates. Scaling this value does not make
sense, as different displays could have different scales.

Ideally, we would send a display identfier and the geometry in display
coordinates. However, since we don't have a mapping of display_id to
wl_output yet in zcr_remote_shell, to avoid adding another
soon-to-be-deprecated event to the protocol, we just remove the scaling.

BUG=b:167267365
TEST=Manual with client-side change: verify input works on multiple
displays with different scale factors.

Change-Id: I250bb3f0c631d8783edae39a71b4fb84532d1729
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2388720
Commit-Queue: Prabir Pradhan <prabirmsp@chromium.org>
Reviewed-by: Mitsuru Oshima (Slow: gardener) <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#805492}