Revert of Enable ServiceWorkerPerfTest (service_worker.service_worker)

Revert of Enable ServiceWorkerPerfTest (service_worker.service_worker) (patchset #1 id:1 of https://codereview.chromium.org/954663002/)

Reason for revert:
Failing on Nexus 10.

Original issue's description:
> Enable ServiceWorkerPerfTest (service_worker.service_worker)
>
> I think https://codereview.chromium.org/884573004/ fixed the ServiceWorker test flakiness.
>
> BUG=433943
> TEST=./tools/perf/run_benchmark --browser-executable=~/chromium/src/out/Debug/chrome --also-run-disabled-tests service_worker.service_worker
>
> Committed: https://crrev.com/adaa44fc1275085c09fff18d8f2dfbddd88bc186
> Cr-Commit-Position: refs/heads/master@{#317807}

TBR=falken@chromium.org,nednguyen@google.com,sullivan@chromium.org,horo@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=433943
Committed: https://crrev.com/6aa34fa4e41d77e92d86f3f0c5f80fab9bdda749
Cr-Commit-Position: refs/heads/master@{#318066}

[shatch, 2015-02-25 17:08:49]

Created Revert of Enable ServiceWorkerPerfTest (service_worker.service_worker)

[commit-bot: I haz the power, 2015-02-25 17:10:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/959793002/1

[commit-bot: I haz the power, 2015-02-25 17:10:43]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-25 17:11:11]

Patchset 1 (id:??) landed as
https://crrev.com/6aa34fa4e41d77e92d86f3f0c5f80fab9bdda749
Cr-Commit-Position: refs/heads/master@{#318066}

[horo, 2015-03-23 11:29:28]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/1027743004/ by horo@chromium.org.

The reason for reverting is: avconv is available on Nexus 10.
https://code.google.com/p/chromium/issues/detail?id=433943#c37.