Revert of Make Hands-Off Zero-Touch Enrollment compatibile with tests

Revert of Make Hands-Off Zero-Touch Enrollment compatibile with tests (patchset #10 id:180001 of https://codereview.chromium.org/2870203003/ )

Reason for revert:
UpdateScreenUnitTest is failing on ASan LSan:

https://uberchromegw.corp.google.com/i/chromium.memory/builders/Linux%20Chromium%20OS%20ASan%20LSan%20Tests%20%281%29/builds/21254

Original issue's description:
> Make Hands-Off Zero-Touch Enrollment compatibile with tests
> 
> Specifically, the automatic nature of Hands-Off Enrollment leads to
> the DUT performing an update check after reboot which interferes
> with autoupdate_EndToEndTest. This CL fixes that issue.
> It does so by instructing the UpdateScreen to skip checking for updates
> if both of the following conditions hold:
> 1. The previous update check initiated by the UpdateScreen did not result
> in an update.
> 2. This previous update check occurred during the last hour.
> 
> BUG=chromium:710716
> TEST=unit test
> 
> Review-Url: https://codereview.chromium.org/2870203003
> Cr-Commit-Position: refs/heads/master@{#473065}
> Committed: https://chromium.googlesource.com/chromium/src/+/0e9353d37e60a871304084a1b34222062c4803e9

TBR=xiyuan@chromium.org,alemate@chromium.org,kumarniranjan@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:710716
Review-Url: https://codereview.chromium.org/2889383002
Cr-Commit-Position: refs/heads/master@{#473137}
Committed: https://chromium.googlesource.com/chromium/src/+/006210c0d82e054c7474fdb76501c5b59279fecb

[Marc Treib, 2017-05-19 09:27:10]

The CQ bit was checked by treib@chromium.org

[Marc Treib, 2017-05-19 09:27:10]

Created Revert of Make Hands-Off Zero-Touch Enrollment compatibile with tests

[commit-bot: I haz the power, 2017-05-19 09:27:40]

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, 2017-05-19 09:28:20]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1495186030336550, "parent_rev":
"a750e6b25c61c2b00af58acd4f4d8c4554c403d0", "commit_rev":
"006210c0d82e054c7474fdb76501c5b59279fecb"}

[commit-bot: I haz the power, 2017-05-19 09:28:31]

Description was changed from

==========
Revert of Make Hands-Off Zero-Touch Enrollment compatibile with tests (patchset
#10 id:180001 of https://codereview.chromium.org/2870203003/ )

Reason for revert:
UpdateScreenUnitTest is failing on ASan LSan:

https://uberchromegw.corp.google.com/i/chromium.memory/builders/Linux%20Chrom...

Original issue's description:
> Make Hands-Off Zero-Touch Enrollment compatibile with tests
> 
> Specifically, the automatic nature of Hands-Off Enrollment leads to
> the DUT performing an update check after reboot which interferes
> with autoupdate_EndToEndTest. This CL fixes that issue.
> It does so by instructing the UpdateScreen to skip checking for updates
> if both of the following conditions hold:
> 1. The previous update check initiated by the UpdateScreen did not result
> in an update.
> 2. This previous update check occurred during the last hour.
> 
> BUG=chromium:710716
> TEST=unit test
> 
> Review-Url: https://codereview.chromium.org/2870203003
> Cr-Commit-Position: refs/heads/master@{#473065}
> Committed:
https://chromium.googlesource.com/chromium/src/+/0e9353d37e60a871304084a1b342...

TBR=xiyuan@chromium.org,alemate@chromium.org,kumarniranjan@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:710716
==========

to

==========
Revert of Make Hands-Off Zero-Touch Enrollment compatibile with tests (patchset
#10 id:180001 of https://codereview.chromium.org/2870203003/ )

Reason for revert:
UpdateScreenUnitTest is failing on ASan LSan:

https://uberchromegw.corp.google.com/i/chromium.memory/builders/Linux%20Chrom...

Original issue's description:
> Make Hands-Off Zero-Touch Enrollment compatibile with tests
> 
> Specifically, the automatic nature of Hands-Off Enrollment leads to
> the DUT performing an update check after reboot which interferes
> with autoupdate_EndToEndTest. This CL fixes that issue.
> It does so by instructing the UpdateScreen to skip checking for updates
> if both of the following conditions hold:
> 1. The previous update check initiated by the UpdateScreen did not result
> in an update.
> 2. This previous update check occurred during the last hour.
> 
> BUG=chromium:710716
> TEST=unit test
> 
> Review-Url: https://codereview.chromium.org/2870203003
> Cr-Commit-Position: refs/heads/master@{#473065}
> Committed:
https://chromium.googlesource.com/chromium/src/+/0e9353d37e60a871304084a1b342...

TBR=xiyuan@chromium.org,alemate@chromium.org,kumarniranjan@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=chromium:710716

Review-Url: https://codereview.chromium.org/2889383002
Cr-Commit-Position: refs/heads/master@{#473137}
Committed:
https://chromium.googlesource.com/chromium/src/+/006210c0d82e054c7474fdb76501...
==========

[commit-bot: I haz the power, 2017-05-19 09:28:33]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/006210c0d82e054c7474fdb76501...