Chromiumos-assets 100 & 200: remove useless bootanim frames

Once the Chromium wheel is done turning, there is no point adding
extra frames. These frames slow down boot because they need to be
loaded from disk, and because they are displayed for a fixed amount
of time.

BUG=chromium:771043
TEST=boot on glimmer, Chromium wheel is still turning

Change-Id: I35fbc5081b6f906162f2c6d7c4b99c67d3d81c54
Reviewed-on: https://chromium-review.googlesource.com/700035
Commit-Ready: Stéphane Marchesin <marcheu@chromium.org>
Tested-by: Stéphane Marchesin <marcheu@chromium.org>
Reviewed-by: Dan Erat <derat@chromium.org>
10 files changed