Make some editing layout test files to use w3c test harness

Make some editing layout test files to use w3c test harness

This patch makes following tests to use w3c test harness to simplify tests
and reduce flakiness.

This patch is a preparation of getting rid of synchronous code path for
spellcheck.

BUG=295722
TEST=n/a; no behavior changes

Committed: https://crrev.com/428cf58f0aa4848617963cadabba117dfe097c64
Cr-Commit-Position: refs/heads/master@{#360530}

[yosin_UTC9, 2015-11-19 05:03:43]

Description was changed from

==========
2015-11-19T12:41:19

BUG=295772
==========

to

==========
Make some editing layout test files to use w3c test harness

This patch makes following tests to use w3c test harness to simplify tests
and reduce flakiness.

This patch is a preparation of getting rid of synchronous code path for
spellcheck.

BUG=295722
TETS=n/a; no behavior changes
==========

[yosin_UTC9, 2015-11-19 05:03:43]

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

[yosin_UTC9, 2015-11-19 05:03:59]

Description was changed from

==========
Make some editing layout test files to use w3c test harness

This patch makes following tests to use w3c test harness to simplify tests
and reduce flakiness.

This patch is a preparation of getting rid of synchronous code path for
spellcheck.

BUG=295722
TETS=n/a; no behavior changes
==========

to

==========
Make some editing layout test files to use w3c test harness

This patch makes following tests to use w3c test harness to simplify tests
and reduce flakiness.

This patch is a preparation of getting rid of synchronous code path for
spellcheck.

BUG=295722
TEST=n/a; no behavior changes
==========

[yosin_UTC9, 2015-11-19 05:04:11]

PTAL

[hajimehoshi, 2015-11-19 05:09:59]

lgtm

[yosin_UTC9, 2015-11-19 05:17:39]

The CQ bit was checked by yosin@chromium.org

[commit-bot: I haz the power, 2015-11-19 05:17:52]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1455413002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1455413002/1

[commit-bot: I haz the power, 2015-11-19 05:34:22]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-19 05:35:21]

Patchset 1 (id:??) landed as
https://crrev.com/428cf58f0aa4848617963cadabba117dfe097c64
Cr-Commit-Position: refs/heads/master@{#360530}