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

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
BUG=531990, 608006
Review-Url: https://codereview.chromium.org/1945823004
Cr-Commit-Position: refs/heads/master@{#391723}
(cherry picked from commit 08405679e3c56b833b4c6da3135b30485fad279b)

Committed: https://chromium.googlesource.com/chromium/src/+/f0a505bf8131eb3bff547835f89dd3036ab5c90f

[kochi, 2016-05-11 01:35:02]

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
BUG=531990, 608006

Review-Url: https://codereview.chromium.org/1945823004
Cr-Commit-Position: refs/heads/master@{#391723}
(cherry picked from commit 08405679e3c56b833b4c6da3135b30485fad279b)
==========

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
BUG=531990, 608006

Review-Url: https://codereview.chromium.org/1945823004
Cr-Commit-Position: refs/heads/master@{#391723}
(cherry picked from commit 08405679e3c56b833b4c6da3135b30485fad279b)

Committed:
https://chromium.googlesource.com/chromium/src/+/f0a505bf8131eb3bff547835f89d...
==========

[kochi, 2016-05-11 01:35:04]

Committed patchset #1 (id:1) manually as
f0a505bf8131eb3bff547835f89dd3036ab5c90f.

[tkent, 2016-05-11 01:40:53]

lgtm