Avoid non-opaque->opaque requests to SkCanvas::writePixels()

Avoid non-opaque->opaque requests to SkCanvas::writePixels()

While we're working on defining this, let's update the callsite
to avoid utilizing an undefined behavior.

BUG=skia:6021
BUG=skia:6157
Review-Url: https://codereview.chromium.org/2659063003
Cr-Commit-Position: refs/heads/master@{#448309}
Committed: https://chromium.googlesource.com/chromium/src/+/beb8b50583644cbb1e2d48d0d08db3a499712b05

[msarett1, 2017-01-27 21:37:23]

The CQ bit was checked by msarett@chromium.org to run a CQ dry run

[msarett1, 2017-01-27 21:37:39]

msarett@chromium.org changed reviewers:
+ junov@chromium.org

[commit-bot: I haz the power, 2017-01-27 21:38:10]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-01-27 23:47:32]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-01-27 23:47:33]

Dry run: This issue passed the CQ dry run.

[msarett1, 2017-02-06 14:38:50]

Ping :), any thoughts junov?

[Justin Novosad, 2017-02-06 15:53:40]

lgtm

[msarett1, 2017-02-06 15:54:38]

The CQ bit was checked by msarett@chromium.org

[commit-bot: I haz the power, 2017-02-06 15:54:57]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-06 18:15:58]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1486396478396980, "parent_rev":
"29b572b3ffeb491584ce5e6cd24a5eca9ac4d738", "commit_rev":
"beb8b50583644cbb1e2d48d0d08db3a499712b05"}

[commit-bot: I haz the power, 2017-02-06 18:16:32]

Description was changed from

==========
Avoid non-opaque->opaque requests to SkCanvas::writePixels()

While we're working on defining this, let's update the callsite
to avoid utilizing an undefined behavior.

BUG=skia:6021
BUG=skia:6157
==========

to

==========
Avoid non-opaque->opaque requests to SkCanvas::writePixels()

While we're working on defining this, let's update the callsite
to avoid utilizing an undefined behavior.

BUG=skia:6021
BUG=skia:6157

Review-Url: https://codereview.chromium.org/2659063003
Cr-Commit-Position: refs/heads/master@{#448309}
Committed:
https://chromium.googlesource.com/chromium/src/+/beb8b50583644cbb1e2d48d0d08d...
==========

[commit-bot: I haz the power, 2017-02-06 18:16:33]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/beb8b50583644cbb1e2d48d0d08d...