[Merge M56] arc: Enable silent auth flow by default.

[Merge M56] arc: Enable silent auth flow by default.

BUG=b/34219301
BUG=680166
TEST=Manually
TBR=elijahtaylor@chromium.org
NOTRY=true
NOPRESUBMIT=true


Review-Url: https://codereview.chromium.org/2627093002
Cr-Commit-Position: refs/heads/master@{#444769}
(cherry picked from commit e17519010f463724f7c81bc9b470ba142c9ec3a5)

Review-Url: https://codereview.chromium.org/2695363002
Cr-Commit-Position: refs/branch-heads/2924@{#919}
Cr-Branched-From: 3a87aecc31cd1ffe751dd72c04e5a96a1fc8108a-refs/heads/master@{#433059}
Committed: https://chromium.googlesource.com/chromium/src/+/71458966cfac90f5c86f1396af1f88722ada1f96

[khmel, 2017-02-16 00:13:35]

The CQ bit was checked by khmel@chromium.org

[commit-bot: I haz the power, 2017-02-16 00:14:55]

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, 2017-02-16 00:21:12]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487204015684770, "parent_rev":
"f9417d0de22cd9bb0940421c3823470356522bd4", "commit_rev":
"71458966cfac90f5c86f1396af1f88722ada1f96"}

[commit-bot: I haz the power, 2017-02-16 00:21:52]

Description was changed from

==========
[Merge M56] arc: Enable silent auth flow by default.

BUG=b/34219301
BUG=680166
TEST=Manually
TBR=elijahtaylor@chromium.org
NOTRY=true
NOPRESUBMIT=true


Review-Url: https://codereview.chromium.org/2627093002
Cr-Commit-Position: refs/heads/master@{#444769}
(cherry picked from commit e17519010f463724f7c81bc9b470ba142c9ec3a5)
==========

to

==========
[Merge M56] arc: Enable silent auth flow by default.

BUG=b/34219301
BUG=680166
TEST=Manually
TBR=elijahtaylor@chromium.org
NOTRY=true
NOPRESUBMIT=true


Review-Url: https://codereview.chromium.org/2627093002
Cr-Commit-Position: refs/heads/master@{#444769}
(cherry picked from commit e17519010f463724f7c81bc9b470ba142c9ec3a5)

Review-Url: https://codereview.chromium.org/2695363002
Cr-Commit-Position: refs/branch-heads/2924@{#919}
Cr-Branched-From:
3a87aecc31cd1ffe751dd72c04e5a96a1fc8108a-refs/heads/master@{#433059}
Committed:
https://chromium.googlesource.com/chromium/src/+/71458966cfac90f5c86f1396af1f...
==========

[commit-bot: I haz the power, 2017-02-16 00:21:53]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/71458966cfac90f5c86f1396af1f...