Refactor how the updater state data is serialized in update checks.

Refactor how the updater state data is serialized in update checks.

This is mostly a mechanical change that affects how the updater state is
serialized in the component updater update checks.

The outcome of this change is that the "domainjoined" attribute is
serialized as an XML attribute of the request element. The other attributes
of the updater state are serialized as an XML <updater> element.

This change tears down the previous implementation of passing the
updater state thorough the recovery component.

There is a change in behavior: the updater state is serialized only for
Google Chrome builds. The "domainjoined" attribute is an exception and it
is being serialized for all Chromium builds.

Last, the updater state is read on a blocking pool task runner, and therefore,
it can be implemented for macOS builds too.

BUG=615187
Committed: https://crrev.com/97bd029159326fcd0792045a451b99cf9b20c913
Cr-Commit-Position: refs/heads/master@{#431907}

[Sorin Jianu, 2016-11-14 16:52:31]

The CQ bit was checked by sorin@chromium.org to run a CQ dry run

[Sorin Jianu, 2016-11-14 16:52:55]

sorin@chromium.org changed reviewers:
+ waffles@chromium.org

[Sorin Jianu, 2016-11-14 16:52:56]

PTAL

[commit-bot: I haz the power, 2016-11-14 16:53:02]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[waffles, 2016-11-14 17:10:34]

lgtm

[commit-bot: I haz the power, 2016-11-14 17:49:35]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-11-14 17:49:36]

Dry run: This issue passed the CQ dry run.

[Sorin Jianu, 2016-11-14 19:30:11]

The CQ bit was checked by sorin@chromium.org

[commit-bot: I haz the power, 2016-11-14 19:31:12]

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, 2016-11-14 19:47:23]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-14 20:10:18]

Description was changed from

==========
Refactor how the updater state data is serialized in update checks.

This is mostly a mechanical change that affects how the updater state is
serialized in the component updater update checks.

The outcome of this change is that the "domainjoined" attribute is
serialized as an XML attribute of the request element. The other attributes
of the updater state are serialized as an XML <updater> element.

This change tears down the previous implementation of passing the
updater state thorough the recovery component.

There is a change in behavior: the updater state is serialized only for
Google Chrome builds. The "domainjoined" attribute is an exception and it
is being serialized for all Chromium builds.

Last, the updater state is read on a blocking pool task runner, and therefore,
it can be implemented for macOS builds too.


BUG=615187
==========

to

==========
Refactor how the updater state data is serialized in update checks.

This is mostly a mechanical change that affects how the updater state is
serialized in the component updater update checks.

The outcome of this change is that the "domainjoined" attribute is
serialized as an XML attribute of the request element. The other attributes
of the updater state are serialized as an XML <updater> element.

This change tears down the previous implementation of passing the
updater state thorough the recovery component.

There is a change in behavior: the updater state is serialized only for
Google Chrome builds. The "domainjoined" attribute is an exception and it
is being serialized for all Chromium builds.

Last, the updater state is read on a blocking pool task runner, and therefore,
it can be implemented for macOS builds too.

BUG=615187

Committed: https://crrev.com/97bd029159326fcd0792045a451b99cf9b20c913
Cr-Commit-Position: refs/heads/master@{#431907}
==========

[commit-bot: I haz the power, 2016-11-14 20:10:18]

Patchset 1 (id:??) landed as
https://crrev.com/97bd029159326fcd0792045a451b99cf9b20c913
Cr-Commit-Position: refs/heads/master@{#431907}