XMLHttpRequest: check if 'loadstart' handler cancelled send().

XMLHttpRequest: check if 'loadstart' handler cancelled send().

'loadstart' is dispatched to both 'download' and upload event handlers
while initiating a send() operation. Should those event handlers cause
the ongoing send operation to be aborted/stopped/cancelled, this outer
send() operation shouldn't proceed upon return.

R=yhirano
BUG=642242
Committed: https://crrev.com/13c30eae8fbe5a1b9927c12be1cd88d102009932
Cr-Commit-Position: refs/heads/master@{#433157}

[sof, 2016-11-16 14:08:11]

The CQ bit was checked by sigbjornf@opera.com to run a CQ dry run

[commit-bot: I haz the power, 2016-11-16 14:08:34]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[sof, 2016-11-16 14:21:02]

sigbjornf@opera.com changed reviewers:
+ tyoshino@chromium.org, yhirano@chromium.org

[sof, 2016-11-16 14:21:03]

please take a look.

WPT's abort-event-loadend.htm already runs into this case, albeit
"unintentionally". So I think we should address it right away and not wait for
(any) spec clarification.

[commit-bot: I haz the power, 2016-11-16 15:28:47]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-11-16 15:28:48]

Dry run: This issue passed the CQ dry run.

[yhirano, 2016-11-18 02:17:56]

lgtm

[sof, 2016-11-18 07:41:51]

Description was changed from

==========
XMLHttpRequest: check if 'loadstart' handler cancelled send().

'loadstart' is dispatched to both 'download' and upload event handlers
while initiating a send() operation. Should those event handlers cause
the ongoing send operation to be aborted/stopped/cancelled, this outer
send() operation shouldn't proceed upon return.

R=
BUG=642242
==========

to

==========
XMLHttpRequest: check if 'loadstart' handler cancelled send().

'loadstart' is dispatched to both 'download' and upload event handlers
while initiating a send() operation. Should those event handlers cause
the ongoing send operation to be aborted/stopped/cancelled, this outer
send() operation shouldn't proceed upon return.

R=yhirano
BUG=642242
==========

[sof, 2016-11-18 07:42:01]

The CQ bit was checked by sigbjornf@opera.com

[commit-bot: I haz the power, 2016-11-18 07:42:15]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[sof, 2016-11-18 08:30:51]

thanks, landing. Will follow up on any spec changes, once those are decided.

[commit-bot: I haz the power, 2016-11-18 09:07:54]

Description was changed from

==========
XMLHttpRequest: check if 'loadstart' handler cancelled send().

'loadstart' is dispatched to both 'download' and upload event handlers
while initiating a send() operation. Should those event handlers cause
the ongoing send operation to be aborted/stopped/cancelled, this outer
send() operation shouldn't proceed upon return.

R=yhirano
BUG=642242
==========

to

==========
XMLHttpRequest: check if 'loadstart' handler cancelled send().

'loadstart' is dispatched to both 'download' and upload event handlers
while initiating a send() operation. Should those event handlers cause
the ongoing send operation to be aborted/stopped/cancelled, this outer
send() operation shouldn't proceed upon return.

R=yhirano
BUG=642242
==========

[commit-bot: I haz the power, 2016-11-18 09:07:55]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-11-18 09:09:51]

Description was changed from

==========
XMLHttpRequest: check if 'loadstart' handler cancelled send().

'loadstart' is dispatched to both 'download' and upload event handlers
while initiating a send() operation. Should those event handlers cause
the ongoing send operation to be aborted/stopped/cancelled, this outer
send() operation shouldn't proceed upon return.

R=yhirano
BUG=642242
==========

to

==========
XMLHttpRequest: check if 'loadstart' handler cancelled send().

'loadstart' is dispatched to both 'download' and upload event handlers
while initiating a send() operation. Should those event handlers cause
the ongoing send operation to be aborted/stopped/cancelled, this outer
send() operation shouldn't proceed upon return.

R=yhirano
BUG=642242

Committed: https://crrev.com/13c30eae8fbe5a1b9927c12be1cd88d102009932
Cr-Commit-Position: refs/heads/master@{#433157}
==========

[commit-bot: I haz the power, 2016-11-18 09:09:52]

Patchset 1 (id:??) landed as
https://crrev.com/13c30eae8fbe5a1b9927c12be1cd88d102009932
Cr-Commit-Position: refs/heads/master@{#433157}