Convert editing/style/5017613-*.html to use w3c test harness

Convert editing/style/5017613-*.html to use w3c test harness

This patch converts "editing/style/5017613-*.html" to use w3c test
harness to simplify test files, and merges them into
"editing/style/apply_style_to_plaintext_only.html" to better describe
what the script is doing.

BUG=619452
TEST=n/a; this patch changes a test file

Committed: https://crrev.com/0892e85e1abeb94475fb238852510db5bbf4d665
Cr-Commit-Position: refs/heads/master@{#408054}

[Xiaocheng, 2016-07-27 04:38:32]

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

[commit-bot: I haz the power, 2016-07-27 04:38:47]

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

[Xiaocheng, 2016-07-27 04:38:52]

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

[yosin_UTC9, 2016-07-27 04:51:14]

lgtm

[commit-bot: I haz the power, 2016-07-27 05:46:02]

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

[commit-bot: I haz the power, 2016-07-27 05:46:03]

Dry run: This issue passed the CQ dry run.

[Xiaocheng, 2016-07-27 06:05:56]

The CQ bit was checked by xiaochengh@chromium.org

[commit-bot: I haz the power, 2016-07-27 06:06:09]

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, 2016-07-27 06:09:31]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-27 06:11:15]

Description was changed from

==========
Convert editing/style/5017613-*.html to use w3c test harness

This patch converts "editing/style/5017613-*.html" to use w3c test
harness to simplify test files, and merges them into
"editing/style/apply_style_to_plaintext_only.html" to better describe
what the script is doing.

BUG=619452
TEST=n/a; this patch changes a test file
==========

to

==========
Convert editing/style/5017613-*.html to use w3c test harness

This patch converts "editing/style/5017613-*.html" to use w3c test
harness to simplify test files, and merges them into
"editing/style/apply_style_to_plaintext_only.html" to better describe
what the script is doing.

BUG=619452
TEST=n/a; this patch changes a test file

Committed: https://crrev.com/0892e85e1abeb94475fb238852510db5bbf4d665
Cr-Commit-Position: refs/heads/master@{#408054}
==========

[commit-bot: I haz the power, 2016-07-27 06:11:16]

Patchset 1 (id:??) landed as
https://crrev.com/0892e85e1abeb94475fb238852510db5bbf4d665
Cr-Commit-Position: refs/heads/master@{#408054}