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This is a reland of f57e1c35
which was reverted due to being blamed for the msan failures which
were fixed by d8f72fd2

Original change's description:
> cros - Update appearance of resolution change notification.
>
> This removes the last raster asset in ash_resources.grd, so remove that
> file and the associated build target.
>
> Bug: 840509,505953
> Change-Id: I43ec69b5b8b9fc34aa71a1b65f204447e73b133c
> Reviewed-on: https://chromium-review.googlesource.com/1050523
> Commit-Queue: Evan Stade <estade@chromium.org>
> Reviewed-by: James Cook <jamescook@chromium.org>
> Reviewed-by: Scott Violet <sky@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#557292}

TBR=jamescook@chromium.org,sky@chromium.org

Bug: 840509, 505953
Change-Id: Iae0b07cbf2e14e307b74e11d07d21290ee72291b
Reviewed-on: https://chromium-review.googlesource.com/1054222
Commit-Queue: Evan Stade <estade@chromium.org>
Reviewed-by: Scott Violet <sky@chromium.org>
Reviewed-by: Evan Stade <estade@chromium.org>
Cr-Commit-Position: refs/heads/master@{#557679}