Revert of Revert of [ServiceWorker] Don't allow registration of the ServiceWorker scope outside the script directory.

Revert of Revert of [ServiceWorker] Don't allow registration of the ServiceWorker scope outside the script directory. (patchset #1 id:1 of https://codereview.chromium.org/672353003/)

Reason for revert:
Fixed the test failure by changing the scope in chrome/test/data/push_messaging/test.html.

https://codereview.chromium.org/644763005/


Original issue's description:
> Revert of [ServiceWorker] Don't allow registration of the ServiceWorker scope outside the script directory. (patchset #4 id:70001 of https://codereview.chromium.org/672383003/)
> 
> Reason for revert:
> This patch seems to have broken the following two browser_tests on all platforms, as can be seen on the non-layout bots on the Blink waterfall. We won't be able to roll Blink in Chromium until this is resolved.
> 
> PushMessagingBrowserTest.RegisterFailureNoPermission
> PushMessagingBrowserTest.RegisterSuccess
> 
> Example output:
> http://build.chromium.org/p/chromium.webkit/builders/Linux%20Tests%20%28dbg%29/builds/4400/steps/browser_tests/logs/RegisterSuccess
> 
> [INFO:CONSOLE(7)] "SecurityError - The scope must be under the directory of the script URL.", source: https://127.0.0.1:39935/files/push_messaging/test.html (7)
> ../../chrome/browser/services/gcm/push_messaging_browsertest.cc:142: Failure
> Value of: register_worker_result
>   Actual: "SecurityError - The scope must be under the directory of the script URL."
> Expected: "ok"
> 
> Original issue's description:
> > [ServiceWorker] Don't allow registration of the ServiceWorker scope outside the script directory.
> > 
> > As per discussion on https://github.com/slightlyoff/ServiceWorker/issues/468
> > 
> > BUG=423983
> > 
> > Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=184336
> 
> TBR=falken@chromium.org,horo@chromium.org
> NOTREECHECKS=true
> NOTRY=true
> BUG=423983
> 
> Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=184364

TBR=falken@chromium.org,peter@chromium.org
NOTREECHECKS=true
NOTRY=true
BUG=423983
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=184425

[horo, 2014-10-27 05:53:39]

Created Revert of Revert of [ServiceWorker] Don't allow registration of the
ServiceWorker scope outside the script directory.