Revert of Ship Node.rootNode

Revert of Ship Node.rootNode (patchset #2 id:20001 of https://codereview.chromium.org/1783693002/ )

Reason for revert:
Turns out that the change is not Web-compatible. See https://bugs.chromium.org/p/chromium/issues/detail?id=608006 for details.

Original issue's description:
> Ship Node.rootNode
>
> This CL ships Node.rootNode independently from other ShadowDOM features, in response to requests from web developers.
> LGTM-ed on this thread :  https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/LpXX7Svx8IY
>
> BUG=531990
>
> Committed: https://crrev.com/9ca99ec409a1d6f7baf6dd3cd6929e81c967cac1
> Cr-Commit-Position: refs/heads/master@{#380363}

TBR=tkent@chromium.org,hayato@chromium.org,kochi@chromium.org,yuzus@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=531990
Committed: https://crrev.com/08405679e3c56b833b4c6da3135b30485fad279b
Cr-Commit-Position: refs/heads/master@{#391723}

[dglazkov, 2016-05-04 22:10:14]

Created Revert of Ship Node.rootNode

[commit-bot: I haz the power, 2016-05-04 22:10:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1945823004/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1945823004/1

[commit-bot: I haz the power, 2016-05-05 01:18:16]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-05-05 01:19:40]

Description was changed from

==========
Revert of Ship Node.rootNode (patchset #2 id:20001 of
https://codereview.chromium.org/1783693002/ )

Reason for revert:
Turns out that the change is not Web-compatible. See
https://bugs.chromium.org/p/chromium/issues/detail?id=608006 for details.

Original issue's description:
> Ship Node.rootNode
> 
> This CL ships Node.rootNode independently from other ShadowDOM features, in
response to requests from web developers.
> LGTM-ed on this thread : 
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/LpXX7Svx8IY
> 
> BUG=531990
> 
> Committed: https://crrev.com/9ca99ec409a1d6f7baf6dd3cd6929e81c967cac1
> Cr-Commit-Position: refs/heads/master@{#380363}

TBR=tkent@chromium.org,hayato@chromium.org,kochi@chromium.org,yuzus@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=531990
==========

to

==========
Revert of Ship Node.rootNode (patchset #2 id:20001 of
https://codereview.chromium.org/1783693002/ )

Reason for revert:
Turns out that the change is not Web-compatible. See
https://bugs.chromium.org/p/chromium/issues/detail?id=608006 for details.

Original issue's description:
> Ship Node.rootNode
>
> This CL ships Node.rootNode independently from other ShadowDOM features, in
response to requests from web developers.
> LGTM-ed on this thread : 
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/LpXX7Svx8IY
>
> BUG=531990
>
> Committed: https://crrev.com/9ca99ec409a1d6f7baf6dd3cd6929e81c967cac1
> Cr-Commit-Position: refs/heads/master@{#380363}

TBR=tkent@chromium.org,hayato@chromium.org,kochi@chromium.org,yuzus@chromium.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=531990

Committed: https://crrev.com/08405679e3c56b833b4c6da3135b30485fad279b
Cr-Commit-Position: refs/heads/master@{#391723}
==========

[commit-bot: I haz the power, 2016-05-05 01:19:42]

Patchset 1 (id:??) landed as
https://crrev.com/08405679e3c56b833b4c6da3135b30485fad279b
Cr-Commit-Position: refs/heads/master@{#391723}

[kochi, 2016-05-06 04:33:49]

lgtm

[hayato, 2016-05-09 04:59:13]

lgtm