Clean up code and logic related to platform accessibility node destruction.

Clean up code and logic related to platform accessibility node destruction.

Committed: https://crrev.com/fc4b14e1762e295009fa17e12ebcead02f6f6b23
Cr-Commit-Position: refs/heads/master@{#394733}

[mharanczyk, 2016-05-18 10:31:01]

mharanczyk@opera.com changed reviewers:
+ dmazzoni@chromium.org

[mharanczyk, 2016-05-18 10:31:02]

dmazzoni@ here is a cleanup of platform accessibility nodes destruction logic.
I've added Dispose method to base class that will by default delete itself and
is overridden on win to call Release().
I've also cleaned up other platforms implementations (mac and lin-aura) for
consistency, but don't have easy access to those platforms at the moment so
those changes are not live tested. They were small enough so should be ok.
Since all deriving classes should now always call AxPlatformNodeBase::Destroy
one way or the other, I've moved delegate_ null check from win destructor to
base class destructor.
Please take a look.

[dmazzoni, 2016-05-18 16:34:22]

lgtm

Thanks, this is great.

[mharanczyk, 2016-05-19 09:58:52]

The CQ bit was checked by mharanczyk@opera.com

[commit-bot: I haz the power, 2016-05-19 09:58:59]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1987213002/20001
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1987213002/20001

[commit-bot: I haz the power, 2016-05-19 11:06:48]

Committed patchset #2 (id:20001)

[commit-bot: I haz the power, 2016-05-19 11:07:58]

Description was changed from

==========
Clean up code and logic related to platform accessibility node destruction.
==========

to

==========
Clean up code and logic related to platform accessibility node destruction.

Committed: https://crrev.com/fc4b14e1762e295009fa17e12ebcead02f6f6b23
Cr-Commit-Position: refs/heads/master@{#394733}
==========

[commit-bot: I haz the power, 2016-05-19 11:07:59]

Patchset 2 (id:??) landed as
https://crrev.com/fc4b14e1762e295009fa17e12ebcead02f6f6b23
Cr-Commit-Position: refs/heads/master@{#394733}