commit 695da9c53938e41e3dad12238c4e0374539c9d9a
author ckitagawa <ckitagawa@chromium.org> Mon Apr 12 17:32:54 2021
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> Mon Apr 12 17:32:54 2021
tree e6eba6649efb61e48013fe3f98d8f182e8561e8a
parent c78127aa713d6042bba346f1b1ae76375ba0ebfc

[Paint Preview] Handle failed alpha inflation

Alpha inflation has been seen to fail very rarely in the beta channel.
When this happens the bitmap fails to draw as:
1) ARGB_8888 is the config.
2) hasAlpha() is true.
3) isPremultiplied() is false since the alpha failed to inflate.
This causes an uncatchable runtime exception when attempting to draw to
a canvas.

If alpha inflation fails
1) If we choose to ignore the failure, hasAlpha() should remain false
   which will avoid the exception.
2) We can just skip the failure and try again. It is unclear if the
   issue would be caused by corruption or memory pressure.

As a follow-up to this very rare case we could discard the
CompressibleBitmap and re-request it but that is a lot of work for
such a rare case.

Bug: 1197123
Change-Id: Ib93f581a308e291f94f455a3e705c75af7e78f3d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2815440
Reviewed-by: Mehran Mahmoudi <mahmoudi@chromium.org>
Commit-Queue: Calder Kitagawa <ckitagawa@chromium.org>
Cr-Commit-Position: refs/heads/master@{#871526}