ChildAccountService: periodically re-fetch parent info; retry on failure

ChildAccountService: periodically re-fetch parent info; retry on failure
with exponential backoff!

BUG=372381, 450828
Committed: https://crrev.com/f528e43789eb29153e5cd242b71fc4db46b32dd3
Cr-Commit-Position: refs/heads/master@{#313065}

[Marc Treib, 2015-01-26 13:19:30]

treib@chromium.org changed reviewers:
+ bauerb@chromium.org

[Marc Treib, 2015-01-26 13:19:31]

PTAL!

https://codereview.chromium.org/880483002/diff/1/chrome/browser/supervised_us...
File chrome/browser/supervised_user/child_accounts/child_account_service.cc
(right):

https://codereview.chromium.org/880483002/diff/1/chrome/browser/supervised_us...
chrome/browser/supervised_user/child_accounts/child_account_service.cc:133: //
TODO(treib): Maybe store the last update time in a pref, so we don't
WDYT?

[Bernhard Bauer, 2015-01-26 13:41:23]

lgtm

https://codereview.chromium.org/880483002/diff/1/chrome/browser/supervised_us...
File chrome/browser/supervised_user/child_accounts/child_account_service.cc
(right):

https://codereview.chromium.org/880483002/diff/1/chrome/browser/supervised_us...
chrome/browser/supervised_user/child_accounts/child_account_service.cc:133: //
TODO(treib): Maybe store the last update time in a pref, so we don't
On 2015/01/26 13:19:31, Marc Treib wrote:
> WDYT?

That seems like a good idea. We could check at every start[*]; if the last check
was more than 24 hours ago, we re-check, if not, we set a timer for the
remaining period.

[*]Or ideally even a bit later than directly at startup, to reduce network
contention.

[Marc Treib, 2015-01-26 13:59:27]

The CQ bit was checked by treib@chromium.org

[commit-bot: I haz the power, 2015-01-26 14:00:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/880483002/1

[commit-bot: I haz the power, 2015-01-26 14:46:13]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-26 14:47:16]

Patchset 1 (id:??) landed as
https://crrev.com/f528e43789eb29153e5cd242b71fc4db46b32dd3
Cr-Commit-Position: refs/heads/master@{#313065}