Add WebServiceWorkerErrorType::ErrorTypeAbort

Add WebServiceWorkerErrorType::ErrorTypeAbort

This is needed for removing --enable-service-worker
(https://codereview.chromium.org/339973003/).  Chromium-side currently
returns ErrorTypeDisabled for both "SW is disabled" and "SWContextCore
was destroyed during shutdown" when handling a registration request.
Since the former will no longer happen, add a generic operation aborted
error for the latter.

BUG=365201
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=176500

[falken, 2014-06-19 01:42:25]

r?

This patch is needed for the --enable-service-worker removal patch, particularly
this file:
https://codereview.chromium.org/339973003/diff/1/content/browser/service_work...

[dominicc (has gone to gerrit), 2014-06-19 06:45:15]

On 2014/06/19 01:42:25, falken wrote:
> r?
> 
> This patch is needed for the --enable-service-worker removal patch,
particularly
> this file:
>
https://codereview.chromium.org/339973003/diff/1/content/browser/service_work...

LGTM

[dominicc (has gone to gerrit), 2014-06-19 06:45:17]

The CQ bit was checked by dominicc@chromium.org

[dominicc (has gone to gerrit), 2014-06-19 06:45:25]

The CQ bit was unchecked by dominicc@chromium.org

[falken, 2014-06-19 06:47:24]

+tkent: can you please review as public/ OWNER?

[tkent, 2014-06-19 07:15:59]

lgtm

[commit-bot: I haz the power, 2014-06-19 07:16:35]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/falken@chromium.org/342863003/1

[commit-bot: I haz the power, 2014-06-19 09:45:17]

Change committed as 176500