Remove code that deletes the PreReadFieldTrial registry key.

Remove code that deletes the PreReadFieldTrial registry key.

The code that deletes the PreReadFieldTrial registry key landed in M55.
The key should now have been deleted from every client and the deletion
code should no longer be needed.

BUG=720210, 557984
Review-Url: https://codereview.chromium.org/2875633002
Cr-Commit-Position: refs/heads/master@{#470901}
Committed: https://chromium.googlesource.com/chromium/src/+/2f57af188a5c2c4ac67aa6ed198a37e39cb7f6d6

[fdoray, 2017-05-10 12:02:14]

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

[commit-bot: I haz the power, 2017-05-10 12:02:49]

Dry run: CQ is trying da patch.

Follow status at:
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[fdoray, 2017-05-10 12:03:08]

fdoray@chromium.org changed reviewers:
+ jochen@chromium.org

[fdoray, 2017-05-10 12:03:08]

Please take a look.

[commit-bot: I haz the power, 2017-05-10 13:17:00]

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

[commit-bot: I haz the power, 2017-05-10 13:17:01]

Dry run: This issue passed the CQ dry run.

[jochen (gone - plz use gerrit), 2017-05-11 08:02:50]

lgtm

[fdoray, 2017-05-11 10:16:26]

The CQ bit was checked by fdoray@chromium.org

[commit-bot: I haz the power, 2017-05-11 10:17:16]

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, 2017-05-11 10:23:14]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1494497786429300, "parent_rev":
"aa3196de10db663af40f600d476dfb77587994c3", "commit_rev":
"2f57af188a5c2c4ac67aa6ed198a37e39cb7f6d6"}

[commit-bot: I haz the power, 2017-05-11 10:23:23]

Description was changed from

==========
Remove code that deletes the PreReadFieldTrial registry key.

The code that deletes the PreReadFieldTrial registry key landed in M55.
The key should now have been deleted from every client and the deletion
code should no longer be needed.

BUG=720210,557984
==========

to

==========
Remove code that deletes the PreReadFieldTrial registry key.

The code that deletes the PreReadFieldTrial registry key landed in M55.
The key should now have been deleted from every client and the deletion
code should no longer be needed.

BUG=720210,557984

Review-Url: https://codereview.chromium.org/2875633002
Cr-Commit-Position: refs/heads/master@{#470901}
Committed:
https://chromium.googlesource.com/chromium/src/+/2f57af188a5c2c4ac67aa6ed198a...
==========

[commit-bot: I haz the power, 2017-05-11 10:23:24]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/2f57af188a5c2c4ac67aa6ed198a...