Fix <label> misuses in content settings

Fix <label> misuses in content settings

BUG=409938
Committed: https://crrev.com/2f769f3487d3b8b6a0c2fefa816bf6aa44fde676
Cr-Commit-Position: refs/heads/master@{#293221}

[Evan Stade, 2014-09-03 19:15:19]

estade@chromium.org changed reviewers:
+ arv@chromium.org

[Evan Stade, 2014-09-03 19:15:20]

more of the same

[arv (Not doing code reviews), 2014-09-03 19:50:38]

LGTM

I'm kind of surprised that we never use the IDs from code though.

[Evan Stade, 2014-09-03 19:54:13]

On 2014/09/03 19:50:38, arv wrote:
> LGTM
> 
> I'm kind of surprised that we never use the IDs from code though.

I checked them all (grepped) before removing them. I also looked up when they
were originally added, and it appears they exist just to be able to use for=.

I did find a test that relies on one of the IDs (in the other changelist), and I
fixed the test.

[Evan Stade, 2014-09-03 19:54:21]

The CQ bit was checked by estade@chromium.org

[commit-bot: I haz the power, 2014-09-03 19:55:45]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/estade@chromium.org/538543004/1

[commit-bot: I haz the power, 2014-09-03 23:41:37]

Committed patchset #1 (id:1) as 4659b81e62f77246e8a9965b24bdeb5f8a7f851e

[commit-bot: I haz the power, 2014-09-10 03:28:33]

Patchset 1 (id:??) landed as
https://crrev.com/2f769f3487d3b8b6a0c2fefa816bf6aa44fde676
Cr-Commit-Position: refs/heads/master@{#293221}