Remove layout tests that run execCommand on non-HTML documents

Remove layout tests that run execCommand on non-HTML documents

BUG=484974
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196564

[kouhei (in TOK), 2015-06-05 05:01:35]

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

[kouhei (in TOK), 2015-06-05 05:01:41]

kouhei@chromium.org changed reviewers:
+ yosin@google.com

[kouhei (in TOK), 2015-06-05 05:01:42]

PTAL

[commit-bot: I haz the power, 2015-06-05 05:01:59]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1167033002/1

[kouhei (in TOK), 2015-06-05 05:57:47]

kouhei@chromium.org changed reviewers:
+ yosin@chromium.org
- yosin@google.com

[commit-bot: I haz the power, 2015-06-05 06:31:36]

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

[commit-bot: I haz the power, 2015-06-05 06:31:37]

Dry run: Try jobs failed on following builders:
  linux_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/linux_blink_rel/builds/6...)

[yosin_UTC9, 2015-06-05 07:52:03]

rubber stamp lgtm

[yosin_UTC9, 2015-06-05 07:52:13]

The CQ bit was checked by yosin@chromium.org

[kouhei (in TOK), 2015-06-05 07:52:29]

The CQ bit was checked by kouhei@chromium.org

[kouhei (in TOK), 2015-06-05 07:52:30]

The patchset sent to the CQ was uploaded after l-g-t-m from yosin@chromium.org
Link to the patchset: https://codereview.chromium.org/1167033002/#ps20001
(title: "fix doctype")

[commit-bot: I haz the power, 2015-06-05 07:52:38]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1167033002/20001

[commit-bot: I haz the power, 2015-06-05 08:53:34]

Committed patchset #2 (id:20001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196564