Switch tab launch type for NTP on inactivity experiment.

Switch tab launch type for NTP on inactivity experiment.

FROM_CHROME_UI results in animations that we do not want and
FROM_EXTERNAL_APP allows the NTP to be closed if you hit back,
which I think is nice since we are creating a tab without any
user gesture so making it discardable seems correct.

BUG=695306
Review-Url: https://codereview.chromium.org/2742783004
Cr-Commit-Position: refs/heads/master@{#456233}
Committed: https://chromium.googlesource.com/chromium/src/+/1a8b3d0add5495ca39b37ef772ea725f03c478cd

[Ted C, 2017-03-10 21:51:12]

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

[Ted C, 2017-03-10 21:51:13]

PTAL

[Yusuf, 2017-03-10 23:40:16]

lgtm

[Ted C, 2017-03-10 23:44:01]

The CQ bit was checked by tedchoc@chromium.org

[commit-bot: I haz the power, 2017-03-10 23:44:51]

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, 2017-03-11 00:31:05]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1489189441279020, "parent_rev":
"0b5fb5f6ef0d0deba7d706424cc3a05365172b1a", "commit_rev":
"1a8b3d0add5495ca39b37ef772ea725f03c478cd"}

[commit-bot: I haz the power, 2017-03-11 00:31:46]

Description was changed from

==========
Switch tab launch type for NTP on inactivity experiment.

FROM_CHROME_UI results in animations that we do not want and
FROM_EXTERNAL_APP allows the NTP to be closed if you hit back,
which I think is nice since we are creating a tab without any
user gesture so making it discardable seems correct.

BUG=695306
==========

to

==========
Switch tab launch type for NTP on inactivity experiment.

FROM_CHROME_UI results in animations that we do not want and
FROM_EXTERNAL_APP allows the NTP to be closed if you hit back,
which I think is nice since we are creating a tab without any
user gesture so making it discardable seems correct.

BUG=695306

Review-Url: https://codereview.chromium.org/2742783004
Cr-Commit-Position: refs/heads/master@{#456233}
Committed:
https://chromium.googlesource.com/chromium/src/+/1a8b3d0add5495ca39b37ef772ea...
==========

[commit-bot: I haz the power, 2017-03-11 00:31:47]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/1a8b3d0add5495ca39b37ef772ea...