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

Revert of Added a system caret used for accessibility on Windows. (patchset #31 id:600001 of https://codereview.chromium.org/2852763002/ )

Reason for revert:
The following tests are flaky:

AXSystemCaretWinTest.TestOnInputTypeChangeInTextField
AXSystemCaretWinTest.TestOnCaretBoundsChangeInTextField

see bugs:

https://crbug.com/739682
https://crbug.com/739683

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-Original-Original-Commit-Position: refs/heads/master@{#483558}
> Committed: https://chromium.googlesource.com/chromium/src/+/3fc0df1e01ab7e17318ce50724890f939bc00fa4
> Review-Url: https://codereview.chromium.org/2852763002
> Cr-Original-Commit-Position: refs/heads/master@{#483825}
> Committed: https://chromium.googlesource.com/chromium/src/+/99936ad737f80a465b479d6bc0abacd22767deaf
> Review-Url: https://codereview.chromium.org/2852763002
> Cr-Commit-Position: refs/heads/master@{#484167}
> Committed: https://chromium.googlesource.com/chromium/src/+/300ba535f4b2e5c8fa8953eacbace7f2e19c9082

TBR=ananta@chromium.org,dmazzoni@chromium.org,sadrul@chromium.org,shuchen@chromium.org,sky@chromium.org,nektar@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.

Review-Url: https://codereview.chromium.org/2967373003
Cr-Commit-Position: refs/heads/master@{#484573}
Committed: https://chromium.googlesource.com/chromium/src/+/01981b7a263086f67e350cd6030543562f219f4f

[Elly Fong-Jones, 2017-07-06 12:39:49]

The CQ bit was checked by ellyjones@chromium.org

[Elly Fong-Jones, 2017-07-06 12:39:50]

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

[commit-bot: I haz the power, 2017-07-06 12:40:03]

CQ is trying da patch.

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

[Alexander Potapenko, 2017-07-06 12:41:11]

On 2017/07/06 12:40:03, commit-bot: I haz the power wrote:
> CQ is trying da patch.
> 
> Follow status at:
>
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

lgtm

[commit-bot: I haz the power, 2017-07-06 13:58:37]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1499344789911300, "parent_rev":
"55681d7260b38f6ed29adfe2233fbdac236ace73", "commit_rev":
"01981b7a263086f67e350cd6030543562f219f4f"}

[commit-bot: I haz the power, 2017-07-06 13:58:59]

Description was changed from

==========
Revert of Added a system caret used for accessibility on Windows. (patchset #31
id:600001 of https://codereview.chromium.org/2852763002/ )

Reason for revert:
The following tests are flaky:

AXSystemCaretWinTest.TestOnInputTypeChangeInTextField
AXSystemCaretWinTest.TestOnCaretBoundsChangeInTextField

see bugs:

https://crbug.com/739682
https://crbug.com/739683

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-Original-Original-Commit-Position: refs/heads/master@{#483558}
> Committed:
https://chromium.googlesource.com/chromium/src/+/3fc0df1e01ab7e17318ce5072489...
> Review-Url: https://codereview.chromium.org/2852763002
> Cr-Original-Commit-Position: refs/heads/master@{#483825}
> Committed:
https://chromium.googlesource.com/chromium/src/+/99936ad737f80a465b479d6bc0ab...
> Review-Url: https://codereview.chromium.org/2852763002
> Cr-Commit-Position: refs/heads/master@{#484167}
> Committed:
https://chromium.googlesource.com/chromium/src/+/300ba535f4b2e5c8fa8953eacbac...

TBR=ananta@chromium.org,dmazzoni@chromium.org,sadrul@chromium.org,shuchen@chr...
# Not skipping CQ checks because original CL landed more than 1 days ago.
==========

to

==========
Revert of Added a system caret used for accessibility on Windows. (patchset #31
id:600001 of https://codereview.chromium.org/2852763002/ )

Reason for revert:
The following tests are flaky:

AXSystemCaretWinTest.TestOnInputTypeChangeInTextField
AXSystemCaretWinTest.TestOnCaretBoundsChangeInTextField

see bugs:

https://crbug.com/739682
https://crbug.com/739683

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-Original-Original-Commit-Position: refs/heads/master@{#483558}
> Committed:
https://chromium.googlesource.com/chromium/src/+/3fc0df1e01ab7e17318ce5072489...
> Review-Url: https://codereview.chromium.org/2852763002
> Cr-Original-Commit-Position: refs/heads/master@{#483825}
> Committed:
https://chromium.googlesource.com/chromium/src/+/99936ad737f80a465b479d6bc0ab...
> Review-Url: https://codereview.chromium.org/2852763002
> Cr-Commit-Position: refs/heads/master@{#484167}
> Committed:
https://chromium.googlesource.com/chromium/src/+/300ba535f4b2e5c8fa8953eacbac...

TBR=ananta@chromium.org,dmazzoni@chromium.org,sadrul@chromium.org,shuchen@chr...
# Not skipping CQ checks because original CL landed more than 1 days ago.

Review-Url: https://codereview.chromium.org/2967373003
Cr-Commit-Position: refs/heads/master@{#484573}
Committed:
https://chromium.googlesource.com/chromium/src/+/01981b7a263086f67e350cd60305...
==========

[commit-bot: I haz the power, 2017-07-06 13:59:03]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/01981b7a263086f67e350cd60305...