Use ContainerNode more in DOMEditor

Use ContainerNode more in DOMEditor

Use ContainerNode more in DOMEditor, specifically
this allows us to call replaceChild/removeChild etc.
on ContainerNode directly, skipping the checks in
Node::replaceChild/removeChild.

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=185126

[rwlbuis, 2014-11-10 20:28:09]

rob.buis@samsung.com changed reviewers:
+ apavlov@chromium.org

[rwlbuis, 2014-11-10 20:28:09]

PTAL

[pfeldman, 2014-11-11 10:11:43]

pfeldman@chromium.org changed reviewers:
+ pfeldman@chromium.org

[pfeldman, 2014-11-11 10:11:43]

lgtm

[rwlbuis, 2014-11-11 12:06:46]

The CQ bit was checked by rob.buis@samsung.com

[commit-bot: I haz the power, 2014-11-11 12:07:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/716603002/1

[commit-bot: I haz the power, 2014-11-11 13:22:03]

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

[commit-bot: I haz the power, 2014-11-11 13:22:04]

Try jobs failed on following builders:
  mac_blink_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/mac_blink_rel/builds/30313)

[rwlbuis, 2014-11-11 14:57:09]

The CQ bit was checked by rob.buis@samsung.com

[commit-bot: I haz the power, 2014-11-11 14:57:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/716603002/1

[commit-bot: I haz the power, 2014-11-11 15:34:52]

Committed patchset #1 (id:1) as 185126