According to the discussion in
https://chromium-review.googlesource.com/c/chromium/src/+/938543, the
app icons will be delivered as single 192*192 *.png. Please see the
bug for more details.

Bug: 835350
Cq-Include-Trybots: master.tryserver.chromium.linux:closure_compilation
Change-Id: I4c20f6e90b200559dc0b347beea15233c675d943
Reviewed-on: https://chromium-review.googlesource.com/1035915Reviewed-by: Dmitry Gozman <dgozman@chromium.org>
Commit-Queue: Wenzhao (Colin) Zang <wzang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#554893}