[Extensions] Migrate ServiceWorker off behavior feature system

[Extensions] Migrate ServiceWorker off behavior feature system

The FeatureSystem is failing to retrieve the behavior feature for service
workers, but the only reason this seems to be the case is because of
potential corruption in the JSON files (or the JSON parser otherwise choking).
For now, to reduce the crash rates, just migrate the service worker restriction
off the behavior feature system.

BUG=461915
Committed: https://crrev.com/2507a2fcd25244dadb7dfcc316426bee7b1df275
Cr-Commit-Position: refs/heads/master@{#356123}

[Devlin, 2015-10-26 20:00:35]

rdevlin.cronin@chromium.org changed reviewers:
+ rockot@chromium.org

[Ken Rockot(use gerrit already), 2015-10-26 20:02:59]

that's... odd.  LGTM

[Devlin, 2015-10-26 20:29:01]

On 2015/10/26 20:02:59, Ken Rockot wrote:
> that's... odd.  LGTM

Agreed.  But I've come up with no better explanation.  (If you think of any,
lemme know :))

[Devlin, 2015-10-26 20:29:06]

The CQ bit was checked by rdevlin.cronin@chromium.org

[commit-bot: I haz the power, 2015-10-26 20:29:41]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1417563005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1417563005/1

[commit-bot: I haz the power, 2015-10-26 21:15:20]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-26 21:16:18]

Patchset 1 (id:??) landed as
https://crrev.com/2507a2fcd25244dadb7dfcc316426bee7b1df275
Cr-Commit-Position: refs/heads/master@{#356123}

[anthonyvd, 2015-10-26 21:50:39]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1412683007/ by anthonyvd@chromium.org.

The reason for reverting is: Reverting because this CL appears to be causing
failures on this bot:
https://build.chromium.org/p/chromium.win/builders/Win%20x64%20Builder%20%28d...
..

[Devlin, 2015-10-26 22:11:08]

On 2015/10/26 21:50:39, anthonyvd wrote:
> A revert of this CL (patchset #1 id:1) has been created in
> https://codereview.chromium.org/1412683007/ by mailto:anthonyvd@chromium.org.
> 
> The reason for reverting is: Reverting because this CL appears to be causing
> failures on this bot:
>
https://build.chromium.org/p/chromium.win/builders/Win%20x64%20Builder%20%28d...
> ..

To me, that failure looks like a flake, and it seems like the subsequent build
succeeded compilation?

https://build.chromium.org/p/chromium.win/builders/Win%20x64%20Builder%20%28d...