Only dispose proxy-less WebServiceWorkerRegistration objects.

Only dispose proxy-less WebServiceWorkerRegistration objects.

If a service worker registration is passed along to a resolver that's
in a detached/stopping state, the WebServiceWorkerRegistration is
simply disposed of.

Have that dispose step only delete the object if the registration object
isn't attached to a proxy already. If it is, it is responsible for
releasing the resource.

R=haraken
BUG=426321
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=184288

[sof, 2014-10-23 13:48:01]

sigbjornf@opera.com changed reviewers:
+ falken@chromium.org, haraken@chromium.org, nhiroki@chromium.org

[sof, 2014-10-23 13:48:02]

Please take a look.

No test provided - don't know how to write such a SW re-registration test over a
disappearing execution context.

The repro case on the associated bug no longer crashes when testing locally.

[haraken, 2014-10-23 15:33:21]

LGTM

[sof, 2014-10-23 17:13:42]

The CQ bit was checked by sigbjornf@opera.com

[commit-bot: I haz the power, 2014-10-23 17:14:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/669423002/1

[commit-bot: I haz the power, 2014-10-23 17:18:39]

Committed patchset #1 (id:1) as 184288