Convert editing/style/toggle-style-bold-italic-mixed-editability.html to utilize w3c test harness

Convert editing/style/toggle-style-bold-italic-mixed-editability.html to utilize w3c test harness

This patch converts "toggle-style-bold-italic-mixed-editability.html" to utilize
w3c test harness with |assert_selection()| to simplify test case for improving
code health.

This patch is a preparation of http://crrev.com/1958093002

BUG=625533
TEST=n/a; no behavior chagnes

Committed: https://crrev.com/7282895adefdb62c5724b4e76e65db701ddc532f
Cr-Commit-Position: refs/heads/master@{#427931}

[yosin_UTC9, 2016-10-26 09:11:17]

Description was changed from

==========
2016-10-26T18:09:23

BUG=
==========

to

==========
Convert editing/style/toggle-style-bold-italic-mixed-editability.html to utilize
w3c test harness

This patch converts "toggle-style-bold-italic-mixed-editability.html" to utilize
w3c test harness with |assert_selection()| to simplify test case for improving
code health.

This patch is a preparation of http://crrev.com/1958093002

BUG=625533
TEST=n/a; no behavior chagnes
==========

[yosin_UTC9, 2016-10-26 09:11:27]

The CQ bit was checked by yosin@chromium.org to run a CQ dry run

[commit-bot: I haz the power, 2016-10-26 09:11:49]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[yosin_UTC9, 2016-10-26 09:46:01]

yosin@chromium.org changed reviewers:
+ xiaochengh@chromium.org, yoichio@chromium.org

[yosin_UTC9, 2016-10-26 09:46:02]

PTAL

Since I don't see differences among platform, this test script checks only on
current platform.
Each bot for platform will find platform specific failure.

[commit-bot: I haz the power, 2016-10-26 10:06:22]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-10-26 10:06:23]

Dry run: This issue passed the CQ dry run.

[Xiaocheng, 2016-10-27 02:01:29]

lgtm

[yosin_UTC9, 2016-10-27 04:01:08]

The CQ bit was checked by yosin@chromium.org

[commit-bot: I haz the power, 2016-10-27 04:01:57]

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, 2016-10-27 04:06:16]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-10-27 04:08:34]

Description was changed from

==========
Convert editing/style/toggle-style-bold-italic-mixed-editability.html to utilize
w3c test harness

This patch converts "toggle-style-bold-italic-mixed-editability.html" to utilize
w3c test harness with |assert_selection()| to simplify test case for improving
code health.

This patch is a preparation of http://crrev.com/1958093002

BUG=625533
TEST=n/a; no behavior chagnes
==========

to

==========
Convert editing/style/toggle-style-bold-italic-mixed-editability.html to utilize
w3c test harness

This patch converts "toggle-style-bold-italic-mixed-editability.html" to utilize
w3c test harness with |assert_selection()| to simplify test case for improving
code health.

This patch is a preparation of http://crrev.com/1958093002

BUG=625533
TEST=n/a; no behavior chagnes

Committed: https://crrev.com/7282895adefdb62c5724b4e76e65db701ddc532f
Cr-Commit-Position: refs/heads/master@{#427931}
==========

[commit-bot: I haz the power, 2016-10-27 04:08:35]

Patchset 1 (id:??) landed as
https://crrev.com/7282895adefdb62c5724b4e76e65db701ddc532f
Cr-Commit-Position: refs/heads/master@{#427931}