Fix crash when shutting down affiliated invalidation service provider

Fix crash when shutting down affiliated invalidation service provider

When the affiliated invalidation service provider, it should:
1) unregister itself as an observer of various objects
2) tell consumers to stop using the current invalidation service
3) destroy the device-global invalidation service, if any

Steps 2 and 3 were swapped. This meant that if the device-global
invalidation service happened to be in use, it would be destroyed
without giving consumers a chance to remove their handlers from it.

BUG=455504
TEST=None

Committed: https://crrev.com/b316c7450061cca6f49e92dc356b05cf638f9d81
Cr-Commit-Position: refs/heads/master@{#317017}

[bartfab (slow), 2015-02-19 08:15:27]

bartfab@chromium.org changed reviewers:
+ pneubeck@chromium.org

[bartfab (slow), 2015-02-19 08:15:28]

Hi Philipp,

Could you take a look?

[pneubeck (no reviews), 2015-02-19 08:37:39]

The CQ bit was checked by pneubeck@chromium.org

[pneubeck (no reviews), 2015-02-19 08:37:39]

lgtm

[commit-bot: I haz the power, 2015-02-19 08:38:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/942463002/1

[commit-bot: I haz the power, 2015-02-19 09:03:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-19 09:04:29]

Patchset 1 (id:??) landed as
https://crrev.com/b316c7450061cca6f49e92dc356b05cf638f9d81
Cr-Commit-Position: refs/heads/master@{#317017}