Revert of Added a system caret used for accessibility on Windows.

Revert of Added a system caret used for accessibility on Windows. (patchset #28 id:540001 of https://codereview.chromium.org/2852763002/ )

Reason for revert:
The added test AXSystemCaretWinTest.TestMovingWindow is failing on the bots, e.g. https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%281%29/builds/61190

Original issue's description:
> Added a system caret used for accessibility on Windows.
> 
> Screen magnifiers need to know where the caret is located so that they can show a magnified caret allowing the user to more easily track it.
> Existing screen magnifiers, such as the built-in Windows Magnifier, require a system caret to be present in order to track it. However, Chrome doesn't use the system caret.
> This is an object that implements the same accessibility interface that would have been returned by the system if the system caret had been used.
> R=dmazzoni@chromium.org, shuchen@chromium.org, ellyjones@chromium.org, ananta@chromium.org, sky@chromium.org, sadrul@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2852763002
> Cr-Commit-Position: refs/heads/master@{#483558}
> Committed: https://chromium.googlesource.com/chromium/src/+/3fc0df1e01ab7e17318ce50724890f939bc00fa4

TBR=ananta@chromium.org,dmazzoni@chromium.org,ellyjones@chromium.org,sadrul@chromium.org,shuchen@chromium.org,sky@chromium.org,nektar@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2962273002
Cr-Commit-Position: refs/heads/master@{#483611}
Committed: https://chromium.googlesource.com/chromium/src/+/8620053cfda9ac0f2dd0c2e0231231ccb5033fe9

[Timothy Loh, 2017-06-30 03:08:24]

The CQ bit was checked by timloh@chromium.org

[Timothy Loh, 2017-06-30 03:08:25]

Created Revert of Added a system caret used for accessibility on Windows.

[commit-bot: I haz the power, 2017-06-30 03:08:37]

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, 2017-06-30 03:09:01]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1498792104720520, "parent_rev":
"7c848f01ca9008e1a63c477df8980857eece1183", "commit_rev":
"8620053cfda9ac0f2dd0c2e0231231ccb5033fe9"}

[commit-bot: I haz the power, 2017-06-30 03:09:16]

Description was changed from

==========
Revert of Added a system caret used for accessibility on Windows. (patchset #28
id:540001 of https://codereview.chromium.org/2852763002/ )

Reason for revert:
The added test AXSystemCaretWinTest.TestMovingWindow is failing on the bots,
e.g.
https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%2...

Original issue's description:
> Added a system caret used for accessibility on Windows.
> 
> Screen magnifiers need to know where the caret is located so that they can
show a magnified caret allowing the user to more easily track it.
> Existing screen magnifiers, such as the built-in Windows Magnifier, require a
system caret to be present in order to track it. However, Chrome doesn't use the
system caret.
> This is an object that implements the same accessibility interface that would
have been returned by the system if the system caret had been used.
> R=dmazzoni@chromium.org, shuchen@chromium.org, ellyjones@chromium.org,
ananta@chromium.org, sky@chromium.org, sadrul@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2852763002
> Cr-Commit-Position: refs/heads/master@{#483558}
> Committed:
https://chromium.googlesource.com/chromium/src/+/3fc0df1e01ab7e17318ce5072489...

TBR=ananta@chromium.org,dmazzoni@chromium.org,ellyjones@chromium.org,sadrul@c...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
==========

to

==========
Revert of Added a system caret used for accessibility on Windows. (patchset #28
id:540001 of https://codereview.chromium.org/2852763002/ )

Reason for revert:
The added test AXSystemCaretWinTest.TestMovingWindow is failing on the bots,
e.g.
https://build.chromium.org/p/chromium.win/builders/Win7%20Tests%20%28dbg%29%2...

Original issue's description:
> Added a system caret used for accessibility on Windows.
> 
> Screen magnifiers need to know where the caret is located so that they can
show a magnified caret allowing the user to more easily track it.
> Existing screen magnifiers, such as the built-in Windows Magnifier, require a
system caret to be present in order to track it. However, Chrome doesn't use the
system caret.
> This is an object that implements the same accessibility interface that would
have been returned by the system if the system caret had been used.
> R=dmazzoni@chromium.org, shuchen@chromium.org, ellyjones@chromium.org,
ananta@chromium.org, sky@chromium.org, sadrul@chromium.org
> 
> Review-Url: https://codereview.chromium.org/2852763002
> Cr-Commit-Position: refs/heads/master@{#483558}
> Committed:
https://chromium.googlesource.com/chromium/src/+/3fc0df1e01ab7e17318ce5072489...

TBR=ananta@chromium.org,dmazzoni@chromium.org,ellyjones@chromium.org,sadrul@c...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Review-Url: https://codereview.chromium.org/2962273002
Cr-Commit-Position: refs/heads/master@{#483611}
Committed:
https://chromium.googlesource.com/chromium/src/+/8620053cfda9ac0f2dd0c2e02312...
==========

[commit-bot: I haz the power, 2017-06-30 03:09:17]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/8620053cfda9ac0f2dd0c2e02312...