Added tests for issue 1156353003, ability to distinguish between rich and plain text editable eleme…

Added tests for issue 1156353003, ability to distinguish between rich and plain text editable elements and text fields.

I have to put the test in a separate CL because I have to modify content-shell's test runner.
BUG=491027
R=dmazzoni

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=198171

[dmazzoni, 2015-06-04 03:41:07]

lgtm

Test looks great, thanks

[nektarios, 2015-06-23 16:52:33]

The CQ bit was checked by nektar@chromium.org

[nektarios, 2015-06-23 16:52:33]

The patchset sent to the CQ was uploaded after l-g-t-m from
dmazzoni@chromium.org
Link to the patchset: https://codereview.chromium.org/1149293009/#ps60001
(title: "Renamed test file to match name of function being tested.")

[commit-bot: I haz the power, 2015-06-23 16:52:58]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1149293009/60001

[commit-bot: I haz the power, 2015-06-23 17:54:58]

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

[commit-bot: I haz the power, 2015-06-23 17:54:59]

Exceeded global retry quota

[nektarios, 2015-06-23 17:56:31]

The CQ bit was checked by nektar@chromium.org

[commit-bot: I haz the power, 2015-06-23 17:57:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1149293009/60001

[commit-bot: I haz the power, 2015-06-23 19:07:25]

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

[commit-bot: I haz the power, 2015-06-23 19:07:26]

Try jobs failed on following builders:
  mac_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/mac_blink_rel/builds/60357)

[nektarios, 2015-06-23 19:36:06]

The CQ bit was checked by nektar@chromium.org

[commit-bot: I haz the power, 2015-06-23 19:36:28]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1149293009/60001

[commit-bot: I haz the power, 2015-06-23 21:21:00]

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

[commit-bot: I haz the power, 2015-06-23 21:21:01]

Exceeded global retry quota

[nektarios, 2015-06-23 21:33:15]

The CQ bit was checked by nektar@chromium.org

[commit-bot: I haz the power, 2015-06-23 21:33:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1149293009/60001

[commit-bot: I haz the power, 2015-06-23 22:32:51]

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

[commit-bot: I haz the power, 2015-06-23 22:32:53]

Try jobs failed on following builders:
  mac_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/mac_blink_rel/builds/60411)

[nektarios, 2015-07-01 21:39:50]

The CQ bit was checked by nektar@chromium.org

[nektarios, 2015-07-01 21:39:50]

The patchset sent to the CQ was uploaded after l-g-t-m from
dmazzoni@chromium.org
Link to the patchset: https://codereview.chromium.org/1149293009/#ps80001
(title: "Changed property name from isContentRichlyEditable to
isRichlyEditable.")

[commit-bot: I haz the power, 2015-07-01 21:40:06]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1149293009/80001

[commit-bot: I haz the power, 2015-07-01 23:04:49]

Committed patchset #5 (id:80001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=198171