Revert of Finish implementation of automation API hit testing for the desktop.

Revert of Finish implementation of automation API hit testing for the desktop. (patchset #2 id:20001 of https://codereview.chromium.org/2813083003/ )

Reason for revert:
DesktopHitTest is failing on MSan builder:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=AutomationApiTest.DesktopHitTest

Original issue's description:
> Finish implementation of automation API hit testing for the desktop.
> 
> This change finishes support for AX_ACTION_HIT_TEST in AXHostDelegate
> so that you can send a hit test request on the root of the whole automation
> tree and get a hit test on either views or web content.
> 
> Switches Select-to-speak to use this new API.  A follow-up change will
> change the way select-to-speak works so that it sends the mouse event
> to the extension and the hit test comes from there, but this is a
> self-contained change that can land first.
> 
> BUG=699617
> 
> Review-Url: https://codereview.chromium.org/2813083003
> Cr-Commit-Position: refs/heads/master@{#465716}
> Committed: https://chromium.googlesource.com/chromium/src/+/28ac2d11e80db21b5b7a37968d558c7e95897ebf

TBR=dtseng@chromium.org,dmazzoni@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=699617
Review-Url: https://codereview.chromium.org/2827103003
Cr-Commit-Position: refs/heads/master@{#465839}
Committed: https://chromium.googlesource.com/chromium/src/+/b255728272ac622014b02d02f22d16d3f493f4ae

[aboxhall, 2017-04-20 01:01:45]

The CQ bit was checked by aboxhall@chromium.org

[aboxhall, 2017-04-20 01:01:45]

Created Revert of Finish implementation of automation API hit testing for the
desktop.

[commit-bot: I haz the power, 2017-04-20 01:03:07]

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, 2017-04-20 01:03:39]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1492650105121120, "parent_rev":
"54d7e3050af7ebb57aa7cd99cef14037db03f3bf", "commit_rev":
"b255728272ac622014b02d02f22d16d3f493f4ae"}

[commit-bot: I haz the power, 2017-04-20 01:03:50]

Description was changed from

==========
Revert of Finish implementation of automation API hit testing for the desktop.
(patchset #2 id:20001 of https://codereview.chromium.org/2813083003/ )

Reason for revert:
DesktopHitTest is failing on MSan builder:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=Au...

Original issue's description:
> Finish implementation of automation API hit testing for the desktop.
> 
> This change finishes support for AX_ACTION_HIT_TEST in AXHostDelegate
> so that you can send a hit test request on the root of the whole automation
> tree and get a hit test on either views or web content.
> 
> Switches Select-to-speak to use this new API.  A follow-up change will
> change the way select-to-speak works so that it sends the mouse event
> to the extension and the hit test comes from there, but this is a
> self-contained change that can land first.
> 
> BUG=699617
> 
> Review-Url: https://codereview.chromium.org/2813083003
> Cr-Commit-Position: refs/heads/master@{#465716}
> Committed:
https://chromium.googlesource.com/chromium/src/+/28ac2d11e80db21b5b7a37968d55...

TBR=dtseng@chromium.org,dmazzoni@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=699617
==========

to

==========
Revert of Finish implementation of automation API hit testing for the desktop.
(patchset #2 id:20001 of https://codereview.chromium.org/2813083003/ )

Reason for revert:
DesktopHitTest is failing on MSan builder:
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=Au...

Original issue's description:
> Finish implementation of automation API hit testing for the desktop.
> 
> This change finishes support for AX_ACTION_HIT_TEST in AXHostDelegate
> so that you can send a hit test request on the root of the whole automation
> tree and get a hit test on either views or web content.
> 
> Switches Select-to-speak to use this new API.  A follow-up change will
> change the way select-to-speak works so that it sends the mouse event
> to the extension and the hit test comes from there, but this is a
> self-contained change that can land first.
> 
> BUG=699617
> 
> Review-Url: https://codereview.chromium.org/2813083003
> Cr-Commit-Position: refs/heads/master@{#465716}
> Committed:
https://chromium.googlesource.com/chromium/src/+/28ac2d11e80db21b5b7a37968d55...

TBR=dtseng@chromium.org,dmazzoni@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=699617

Review-Url: https://codereview.chromium.org/2827103003
Cr-Commit-Position: refs/heads/master@{#465839}
Committed:
https://chromium.googlesource.com/chromium/src/+/b255728272ac622014b02d02f22d...
==========

[commit-bot: I haz the power, 2017-04-20 01:03:51]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/b255728272ac622014b02d02f22d...