[Signin] Add timeout to Dice token exchange requests

[Signin] Add timeout to Dice token exchange requests

BUG=730589
Review-Url: https://codereview.chromium.org/2951263002
Cr-Commit-Position: refs/heads/master@{#481906}
Committed: https://chromium.googlesource.com/chromium/src/+/159a49c29c076f9c5583c4607ca6965cd5ec4722

[droger, 2017-06-22 12:24:40]

Patchset #1 (id:1) has been deleted

[droger, 2017-06-22 12:24:44]

Patchset #1 (id:20001) has been deleted

[droger, 2017-06-22 12:24:56]

droger@chromium.org changed reviewers:
+ msarda@chromium.org

[msarda, 2017-06-22 13:06:27]

lgtm

[droger, 2017-06-23 14:42:36]

The CQ bit was checked by droger@chromium.org

[commit-bot: I haz the power, 2017-06-23 14:42:43]

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, 2017-06-23 15:57:51]

CQ is committing da patch.

Bot data: {"patchset_id": 60001, "attempt_start_ts": 1498228956284120,
"parent_rev": "ab4e009f7069ddb500a1ad4503cb19a3a9018458", "commit_rev":
"159a49c29c076f9c5583c4607ca6965cd5ec4722"}

[commit-bot: I haz the power, 2017-06-23 15:58:04]

Description was changed from

==========
[Signin] Add timeout to Dice token exchange requests

BUG=730589
==========

to

==========
[Signin] Add timeout to Dice token exchange requests

BUG=730589

Review-Url: https://codereview.chromium.org/2951263002
Cr-Commit-Position: refs/heads/master@{#481906}
Committed:
https://chromium.googlesource.com/chromium/src/+/159a49c29c076f9c5583c4607ca6...
==========

[commit-bot: I haz the power, 2017-06-23 15:58:05]

Committed patchset #2 (id:60001) as
https://chromium.googlesource.com/chromium/src/+/159a49c29c076f9c5583c4607ca6...