Use SparseBooleanArray to get rid of lint warning.

Use SparseBooleanArray to get rid of lint warning.

The use of SparseArray causes a UseSparseArrays lint
warning.

BUG=635179
Committed: https://crrev.com/5cefdd51a8a172292fbae98ef5d9efbe4563d4d5
Cr-Commit-Position: refs/heads/master@{#410347}

[estevenson, 2016-08-05 23:07:39]

estevenson@chromium.org changed reviewers:
+ twellington@chromium.org

[estevenson, 2016-08-05 23:07:40]

ptal twellington, it seems performance differences would be negligible between
the two structures. If this isn't the right approach I'll just suppress the
warning for now.

[Theresa, 2016-08-05 23:09:50]

This lgtm, thank you!

[estevenson, 2016-08-05 23:24:09]

estevenson@chromium.org changed reviewers:
+ tedchoc@chromium.org

[Ted C, 2016-08-06 00:25:13]

lgtm

[estevenson, 2016-08-08 13:36:13]

The CQ bit was checked by estevenson@chromium.org

[commit-bot: I haz the power, 2016-08-08 13:36:27]

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, 2016-08-08 14:15:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-08 14:18:16]

Description was changed from

==========
Use SparseBooleanArray to get rid of lint warning.

The use of SparseArray causes a UseSparseArrays lint
warning.

BUG=635179
==========

to

==========
Use SparseBooleanArray to get rid of lint warning.

The use of SparseArray causes a UseSparseArrays lint
warning.

BUG=635179

Committed: https://crrev.com/5cefdd51a8a172292fbae98ef5d9efbe4563d4d5
Cr-Commit-Position: refs/heads/master@{#410347}
==========

[commit-bot: I haz the power, 2016-08-08 14:18:17]

Patchset 1 (id:??) landed as
https://crrev.com/5cefdd51a8a172292fbae98ef5d9efbe4563d4d5
Cr-Commit-Position: refs/heads/master@{#410347}