[DevTools] Do not disable blocked URLs list when it's empty

[DevTools] Do not disable blocked URLs list when it's empty

So that 'Add pattern' link continues to work.

BUG=710349
TBR=pfeldman

Review-Url: https://codereview.chromium.org/2807293004
Cr-Commit-Position: refs/heads/master@{#463765}
Committed: https://chromium.googlesource.com/chromium/src/+/923a36a0089cff4f9e9ce2fa51809ab75ff3a749

[dgozman, 2017-04-11 19:02:39]

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

[commit-bot: I haz the power, 2017-04-11 19:04:11]

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, 2017-04-11 20:39:51]

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

[commit-bot: I haz the power, 2017-04-11 20:39:52]

Dry run: This issue passed the CQ dry run.

[dgozman, 2017-04-11 20:48:35]

The CQ bit was checked by dgozman@chromium.org

[commit-bot: I haz the power, 2017-04-11 20:49:56]

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, 2017-04-11 20:59:54]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1491943715993410, "parent_rev":
"cb3f3989f26b3a149c5eb93d3946d615b891daf1", "commit_rev":
"923a36a0089cff4f9e9ce2fa51809ab75ff3a749"}

[commit-bot: I haz the power, 2017-04-11 21:00:51]

Description was changed from

==========
[DevTools] Do not disable blocked URLs list when it's empty

So that 'Add pattern' link continues to work.

BUG=710349
TBR=pfeldman
==========

to

==========
[DevTools] Do not disable blocked URLs list when it's empty

So that 'Add pattern' link continues to work.

BUG=710349
TBR=pfeldman

Review-Url: https://codereview.chromium.org/2807293004
Cr-Commit-Position: refs/heads/master@{#463765}
Committed:
https://chromium.googlesource.com/chromium/src/+/923a36a0089cff4f9e9ce2fa5180...
==========

[commit-bot: I haz the power, 2017-04-11 21:00:52]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/923a36a0089cff4f9e9ce2fa5180...