INPUT element: avoid crash in EventDispatcher::dispatchEventPostProcess().

INPUT element: avoid crash in EventDispatcher::dispatchEventPostProcess().

This CL swaps AX-related code and postDispatchEventHandler() in
dispatchEventPostProcess()

postDispatchEventHandler() may dispatch a 'change' event, and an event handler might
update m_event. accessing m_event->target() after postDispatchEventHandler() isn't
safe.

BUG=685450
Review-Url: https://codereview.chromium.org/2655803006
Cr-Commit-Position: refs/heads/master@{#446258}
Committed: https://chromium.googlesource.com/chromium/src/+/69fa20d42cdab2a175275293d3953c7ca3ba19dc

[tkent, 2017-01-26 02:28:14]

The CQ bit was checked by tkent@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-01-26 02:28:58]

Dry run: 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, 2017-01-26 03:39:02]

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

[commit-bot: I haz the power, 2017-01-26 03:39:03]

Dry run: Try jobs failed on following builders:
  linux_chromium_rel_ng on master.tryserver.chromium.linux (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.linux/builders/linux_chromium_...)

[tkent, 2017-01-26 03:51:30]

The CQ bit was checked by tkent@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2017-01-26 03:51:54]

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

[tkent, 2017-01-26 03:55:56]

Patchset #1 (id:1) has been deleted

[commit-bot: I haz the power, 2017-01-26 06:11:37]

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

[commit-bot: I haz the power, 2017-01-26 06:11:38]

Dry run: This issue passed the CQ dry run.

[tkent, 2017-01-26 06:16:17]

Description was changed from

==========
INPUT element: Do not dispatch 'change' event in
EventDispatcher::dispatchEventPostProcess().

This CL adds EventQueueScope to wrap dispatchEventPostProcess().

We dispatched a 'change' event before finalizing 'click' event, and it caused
a null pointer dereference. We should postpone 'change' event by
EventQueueScope.

BUG=685450
==========

to

==========
INPUT element: avoid crash in EventDispatcher::dispatchEventPostProcess().

This CL swaps AX-related code and postDispatchEventHandler() in
dispatchEventPostProcess()

postDispatchEventHandler() may dispatch a 'change' event, and an event handler
might
update m_event. accessing m_event->target() after postDispatchEventHandler()
isn't
safe.

BUG=685450
==========

[tkent, 2017-01-26 06:16:30]

tkent@chromium.org changed reviewers:
+ keishi@chromium.org

[tkent, 2017-01-26 06:16:31]

keishi@, would you review this please?

[keishi, 2017-01-26 06:19:53]

LGTM

[tkent, 2017-01-26 06:39:00]

The CQ bit was checked by tkent@chromium.org

[commit-bot: I haz the power, 2017-01-26 06:39:30]

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, 2017-01-26 06:43:36]

CQ is committing da patch.

Bot data: {"patchset_id": 20001, "attempt_start_ts": 1485412740971180,
"parent_rev": "602ce136fcac0b2a338a5708f857cf12f8a77467", "commit_rev":
"69fa20d42cdab2a175275293d3953c7ca3ba19dc"}

[commit-bot: I haz the power, 2017-01-26 06:44:08]

Description was changed from

==========
INPUT element: avoid crash in EventDispatcher::dispatchEventPostProcess().

This CL swaps AX-related code and postDispatchEventHandler() in
dispatchEventPostProcess()

postDispatchEventHandler() may dispatch a 'change' event, and an event handler
might
update m_event. accessing m_event->target() after postDispatchEventHandler()
isn't
safe.

BUG=685450
==========

to

==========
INPUT element: avoid crash in EventDispatcher::dispatchEventPostProcess().

This CL swaps AX-related code and postDispatchEventHandler() in
dispatchEventPostProcess()

postDispatchEventHandler() may dispatch a 'change' event, and an event handler
might
update m_event. accessing m_event->target() after postDispatchEventHandler()
isn't
safe.

BUG=685450

Review-Url: https://codereview.chromium.org/2655803006
Cr-Commit-Position: refs/heads/master@{#446258}
Committed:
https://chromium.googlesource.com/chromium/src/+/69fa20d42cdab2a175275293d395...
==========

[commit-bot: I haz the power, 2017-01-26 06:44:09]

Committed patchset #1 (id:20001) as
https://chromium.googlesource.com/chromium/src/+/69fa20d42cdab2a175275293d395...