[tracing] Whitelist levelDb and webcache dump providers for background mode

[tracing] Whitelist levelDb and webcache dump providers for background mode

These providers support background mode now and can be whitelisted.

BUG=629925
Committed: https://crrev.com/d7090f39927449b83607975614be0105a8cf93f4
Cr-Commit-Position: refs/heads/master@{#421053}

[ssid, 2016-09-21 19:09:51]

Patchset #2 (id:20001) has been deleted

[ssid, 2016-09-23 16:37:14]

ssid@chromium.org changed reviewers:
+ primiano@chromium.org

[Primiano Tucci (use gerrit), 2016-09-23 17:17:23]

lgtm

[ssid, 2016-09-26 21:40:42]

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

[commit-bot: I haz the power, 2016-09-26 21:41:12]

Dry run: 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, 2016-09-27 00:37:05]

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

[commit-bot: I haz the power, 2016-09-27 00:37:06]

Dry run: This issue passed the CQ dry run.

[ssid, 2016-09-27 00:37:36]

The CQ bit was checked by ssid@chromium.org

[commit-bot: I haz the power, 2016-09-27 00:38:06]

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, 2016-09-27 00:44:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-09-27 00:49:54]

Description was changed from

==========
[tracing] Whitelist levelDb and webcache dump providers for background mode

These providers support background mode now and can be whitelisted.

BUG=629925
==========

to

==========
[tracing] Whitelist levelDb and webcache dump providers for background mode

These providers support background mode now and can be whitelisted.

BUG=629925

Committed: https://crrev.com/d7090f39927449b83607975614be0105a8cf93f4
Cr-Commit-Position: refs/heads/master@{#421053}
==========

[commit-bot: I haz the power, 2016-09-27 00:49:54]

Patchset 1 (id:??) landed as
https://crrev.com/d7090f39927449b83607975614be0105a8cf93f4
Cr-Commit-Position: refs/heads/master@{#421053}