Reland: arc: avoid checkbox AutomationNode issue

Reland: arc: avoid checkbox AutomationNode issue

The original CL has caused https://crbug.com/638840.
This CL includes the fix to the issue in addition to the original CL.

BUG=638501, 638840
BUG=b/30906810
TEST=tested as described in the issues.
TBR=xiyuan@chromium.org

Original description:
arc: avoid checkbox AutomationNode issue

Avoid checkbox AutomationNode issue https://crbug.com/638498

BUG=638501
BUG=b/30906810
TEST=tested as described in the issue
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Committed: https://crrev.com/359b23f1b3264cea0eac17380c45c200c5e5dd1f
Cr-Commit-Position: refs/heads/master@{#412740}

patch from issue 2254673003 at patchset 1 (http://crrev.com/2254673003#ps1)

Review-Url: https://codereview.chromium.org/2259713003
Cr-Commit-Position: refs/heads/master@{#412887}
(cherry picked from commit 1e2b1930480538185b0cef473949b586d96f4da2)

Committed: https://chromium.googlesource.com/chromium/src/+/29cbc1a0cd1822aef185b482a41ddd23e52251ca

[fukino, 2016-08-23 13:45:21]

Description was changed from

==========
Reland: arc: avoid checkbox AutomationNode issue

The original CL has caused https://crbug.com/638840.
This CL includes the fix to the issue in addition to the original CL.

BUG=638501,638840
BUG=b/30906810
TEST=tested as described in the issues.
TBR=xiyuan@chromium.org

Original description:
arc: avoid checkbox AutomationNode issue

Avoid checkbox AutomationNode issue https://crbug.com/638498

BUG=638501
BUG=b/30906810
TEST=tested as described in the issue
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Committed: https://crrev.com/359b23f1b3264cea0eac17380c45c200c5e5dd1f
Cr-Commit-Position: refs/heads/master@{#412740}

patch from issue 2254673003 at patchset 1 (http://crrev.com/2254673003#ps1)

Review-Url: https://codereview.chromium.org/2259713003
Cr-Commit-Position: refs/heads/master@{#412887}
(cherry picked from commit 1e2b1930480538185b0cef473949b586d96f4da2)
==========

to

==========
Reland: arc: avoid checkbox AutomationNode issue

The original CL has caused https://crbug.com/638840.
This CL includes the fix to the issue in addition to the original CL.

BUG=638501,638840
BUG=b/30906810
TEST=tested as described in the issues.
TBR=xiyuan@chromium.org

Original description:
arc: avoid checkbox AutomationNode issue

Avoid checkbox AutomationNode issue https://crbug.com/638498

BUG=638501
BUG=b/30906810
TEST=tested as described in the issue
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.linux:closure_compilation

Committed: https://crrev.com/359b23f1b3264cea0eac17380c45c200c5e5dd1f
Cr-Commit-Position: refs/heads/master@{#412740}

patch from issue 2254673003 at patchset 1 (http://crrev.com/2254673003#ps1)

Review-Url: https://codereview.chromium.org/2259713003
Cr-Commit-Position: refs/heads/master@{#412887}
(cherry picked from commit 1e2b1930480538185b0cef473949b586d96f4da2)

Committed:
https://chromium.googlesource.com/chromium/src/+/29cbc1a0cd1822aef185b482a41d...
==========

[fukino, 2016-08-23 13:45:23]

Committed patchset #1 (id:1) manually as
29cbc1a0cd1822aef185b482a41ddd23e52251ca.