[Telemetry] Disable session restore with URL benchmarks.

[Telemetry] Disable session restore with URL benchmarks.

Session restore + URL doesn't seem to make a lot of sense and the
codepath is horribly broken. This'll need better unittesting if
anyone plans to bring it back.

BUG=405386
Committed: https://crrev.com/7026d9be1f788447690cb4ed2db2a321a8407775
Cr-Commit-Position: refs/heads/master@{#304607}

[tonyg, 2014-11-18 04:50:20]

tonyg@chromium.org changed reviewers:
+ jeremy@chromium.org, sullivan@chromium.org

[jeremy, 2014-11-18 06:36:10]

LGTM

[sullivan, 2014-11-18 14:38:33]

The CQ bit was checked by sullivan@chromium.org

[sullivan, 2014-11-18 14:38:33]

lgtm

[commit-bot: I haz the power, 2014-11-18 14:38:55]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/738663002/1

[commit-bot: I haz the power, 2014-11-18 15:34:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2014-11-18 15:35:18]

Patchset 1 (id:??) landed as
https://crrev.com/7026d9be1f788447690cb4ed2db2a321a8407775
Cr-Commit-Position: refs/heads/master@{#304607}