Update finch webapk testing config.

Update finch webapk testing config.

Add 'play_install' flag.
BUG=629181
Review-Url: https://codereview.chromium.org/2959903006
Cr-Commit-Position: refs/heads/master@{#483391}
Committed: https://chromium.googlesource.com/chromium/src/+/ba6562fadd7bdd42de61c95ea32fccb97e0b9747

[Yaron, 2017-06-28 22:00:08]

yfriedman@chromium.org changed reviewers:
+ rkaplow@chromium.org

[rkaplow, 2017-06-29 15:28:06]

lgtm

[Yaron, 2017-06-29 15:42:09]

The CQ bit was checked by yfriedman@chromium.org

[commit-bot: I haz the power, 2017-06-29 15:42:24]

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, 2017-06-29 16:56:01]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1498750929193180, "parent_rev":
"a140aabaf85a21c7085e76d039171c1479d53987", "commit_rev":
"ba6562fadd7bdd42de61c95ea32fccb97e0b9747"}

[commit-bot: I haz the power, 2017-06-29 16:56:15]

Description was changed from

==========
Update finch webapk testing config.

Add 'play_install' flag.
BUG=629181
==========

to

==========
Update finch webapk testing config.

Add 'play_install' flag.
BUG=629181

Review-Url: https://codereview.chromium.org/2959903006
Cr-Commit-Position: refs/heads/master@{#483391}
Committed:
https://chromium.googlesource.com/chromium/src/+/ba6562fadd7bdd42de61c95ea32f...
==========

[commit-bot: I haz the power, 2017-06-29 16:56:17]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/ba6562fadd7bdd42de61c95ea32f...