Revert of Service Worker: Add tests for same-scope new script registration

Revert of Service Worker: Add tests for same-scope new script registration (patchset #6 of https://codereview.chromium.org/480943002/)

Reason for revert:
This is crashing on Mac.

Original issue's description:
> Service Worker: Add tests for same-scope, new script registration
> 
> Tests for Chromium patch:
> https://codereview.chromium.org/506043002/
> 
> BUG=398355
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=180948

TBR=michaeln@chromium.org,nhiroki@chromium.org,falken@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=398355
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=180956

[mlamouri (slow - plz ping), 2014-08-27 10:38:32]

Created Revert of Service Worker: Add tests for same-scope new script
registration

[commit-bot: I haz the power, 2014-08-27 10:39:17]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/mlamouri@chromium.org/512703002/1

[commit-bot: I haz the power, 2014-08-27 10:39:51]

Committed patchset #1 (1) as 180956

[horo, 2014-09-11 12:16:16]

A revert of this CL (patchset #1 id:1) has been created in
https://codereview.chromium.org/547743003/ by horo@chromium.org.

The reason for reverting is: This crash will be fixed by
https://codereview.chromium.org/556003006..