Place RefPtr for protection not in internalAbort() but in its caller.

Place RefPtr for protection not in internalAbort() but in its caller.

We have RefPtr for preventing XHR from being destroyed in
internalAbort(). But we're touching XHR's member variables in the caller
of internalAbort(). We must have the RefPtr for protection there.

BUG=421504
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=183859

[tyoshino (SeeGerritForStatus), 2014-10-17 04:23:44]

tyoshino@chromium.org changed reviewers:
+ kouhei@chromium.org

[kouhei (in TOK), 2014-10-17 04:40:25]

The CQ bit was checked by kouhei@chromium.org

[kouhei (in TOK), 2014-10-17 04:40:26]

lgtm

[commit-bot: I haz the power, 2014-10-17 04:40:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/663693003/20001

[commit-bot: I haz the power, 2014-10-17 05:43:25]

Committed patchset #2 (id:20001) as 183859