Revert of Check detached status before attempting to clear drag transfer state.

Revert of Check detached status before attempting to clear drag transfer state. (patchset #2 id:20001 of https://codereview.chromium.org/2759603002/ )

Reason for revert:
The new test fails consistently on WebKit Linux Trusty Leak.

02:51:43.187 21593 worker/2 fast/events/drag-dragend-detaches.html leaked
02:51:43.188 21496 [37229/51558] fast/events/drag-dragend-detaches.html failed unexpectedly (leak detected: ({"numberOfLiveDocuments":[1,2],"numberOfLiveNodes":[4,15],"numberOfLiveSuspendableObjects":[2,3]}))

See https://crbug.com/703057

Original issue's description:
> Check detached status before attempting to clear drag transfer state.
> 
> Speculatively try to address failing access of dragState() when
> clearing out state after 'dragend' has been dispatched.
> 
> R=dcheng
> BUG=702516
> 
> Review-Url: https://codereview.chromium.org/2759603002
> Cr-Commit-Position: refs/heads/master@{#457993}
> Committed: https://chromium.googlesource.com/chromium/src/+/a995166eab58770b85268173bf9b34e4bc276171

TBR=dcheng@chromium.org,sigbjornf@opera.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=702516
Review-Url: https://codereview.chromium.org/2759143002
Cr-Commit-Position: refs/heads/master@{#458077}
Committed: https://chromium.googlesource.com/chromium/src/+/e44e87cea4e3f1106e785f794f5a9d51fb0ed273

[vasilii, 2017-03-20 14:21:12]

The CQ bit was checked by vasilii@chromium.org

[vasilii, 2017-03-20 14:21:12]

Created Revert of Check detached status before attempting to clear drag transfer
state.

[commit-bot: I haz the power, 2017-03-20 14:21:33]

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

[sof, 2017-03-20 14:25:25]

unnecessary churn, please see https://codereview.chromium.org/2759603002/#msg20

[sof, 2017-03-20 14:25:43]

The CQ bit was unchecked by sigbjornf@opera.com

[vasilii, 2017-03-20 14:29:37]

On 2017/03/20 14:25:25, sof wrote:
> unnecessary churn, please see
https://codereview.chromium.org/2759603002/#msg20

I'm not waiting for the code review to make the tree green. If the memory leak
is introduced and the culprit is clear then the patch is to be reverted.

[vasilii, 2017-03-20 14:29:46]

The CQ bit was checked by vasilii@chromium.org

[commit-bot: I haz the power, 2017-03-20 14:30:06]

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

[commit-bot: I haz the power, 2017-03-20 16:04:30]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1490020186843810, "parent_rev":
"c97b008b276174e97d14378ba11037703f98e73a", "commit_rev":
"e44e87cea4e3f1106e785f794f5a9d51fb0ed273"}

[commit-bot: I haz the power, 2017-03-20 16:05:10]

Description was changed from

==========
Revert of Check detached status before attempting to clear drag transfer state.
(patchset #2 id:20001 of https://codereview.chromium.org/2759603002/ )

Reason for revert:
The new test fails consistently on WebKit Linux Trusty Leak.

02:51:43.187 21593 worker/2 fast/events/drag-dragend-detaches.html leaked
02:51:43.188 21496 [37229/51558] fast/events/drag-dragend-detaches.html failed
unexpectedly (leak detected:
({"numberOfLiveDocuments":[1,2],"numberOfLiveNodes":[4,15],"numberOfLiveSuspendableObjects":[2,3]}))

See https://crbug.com/703057

Original issue's description:
> Check detached status before attempting to clear drag transfer state.
> 
> Speculatively try to address failing access of dragState() when
> clearing out state after 'dragend' has been dispatched.
> 
> R=dcheng
> BUG=702516
> 
> Review-Url: https://codereview.chromium.org/2759603002
> Cr-Commit-Position: refs/heads/master@{#457993}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a995166eab58770b85268173bf9b...

TBR=dcheng@chromium.org,sigbjornf@opera.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=702516
==========

to

==========
Revert of Check detached status before attempting to clear drag transfer state.
(patchset #2 id:20001 of https://codereview.chromium.org/2759603002/ )

Reason for revert:
The new test fails consistently on WebKit Linux Trusty Leak.

02:51:43.187 21593 worker/2 fast/events/drag-dragend-detaches.html leaked
02:51:43.188 21496 [37229/51558] fast/events/drag-dragend-detaches.html failed
unexpectedly (leak detected:
({"numberOfLiveDocuments":[1,2],"numberOfLiveNodes":[4,15],"numberOfLiveSuspendableObjects":[2,3]}))

See https://crbug.com/703057

Original issue's description:
> Check detached status before attempting to clear drag transfer state.
> 
> Speculatively try to address failing access of dragState() when
> clearing out state after 'dragend' has been dispatched.
> 
> R=dcheng
> BUG=702516
> 
> Review-Url: https://codereview.chromium.org/2759603002
> Cr-Commit-Position: refs/heads/master@{#457993}
> Committed:
https://chromium.googlesource.com/chromium/src/+/a995166eab58770b85268173bf9b...

TBR=dcheng@chromium.org,sigbjornf@opera.com
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=702516

Review-Url: https://codereview.chromium.org/2759143002
Cr-Commit-Position: refs/heads/master@{#458077}
Committed:
https://chromium.googlesource.com/chromium/src/+/e44e87cea4e3f1106e785f794f5a...
==========

[commit-bot: I haz the power, 2017-03-20 16:05:11]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/e44e87cea4e3f1106e785f794f5a...