Revert of Implement the script parts of custom element upgrade steps.

Revert of Implement the script parts of custom element upgrade steps. (patchset #2 id:20001 of https://codereview.chromium.org/2035623002/ )

Reason for revert:
Speculative revert for breaking Win compile, will follow-up on the bug with more details soon.

Original issue's description:
> Implement the script parts of custom element upgrade steps.
>
> BUG=594918
>
> Committed: https://crrev.com/ee58801ba1e4a49cc2eea50d970444c7eeff9593
> Cr-Commit-Position: refs/heads/master@{#397676}

TBR=kojii@chromium.org,blink-reviews-bindings@chromium.org,haraken@chromium.org,dominicc@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=594918
Committed: https://crrev.com/e6951b31a44e4701e982b997d6cf8a9db83f213e
Cr-Commit-Position: refs/heads/master@{#397680}

[vabr (Chromium), 2016-06-03 11:11:45]

The CQ bit was checked by vabr@chromium.org

[vabr (Chromium), 2016-06-03 11:11:45]

Created Revert of Implement the script parts of custom element upgrade steps.

[commit-bot: I haz the power, 2016-06-03 11:11:56]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2032373002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/2032373002/1

[commit-bot: I haz the power, 2016-06-03 11:12:36]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-03 11:13:33]

Description was changed from

==========
Revert of Implement the script parts of custom element upgrade steps. (patchset
#2 id:20001 of https://codereview.chromium.org/2035623002/ )

Reason for revert:
Speculative revert for breaking Win compile, will follow-up on the bug with more
details soon.

Original issue's description:
> Implement the script parts of custom element upgrade steps.
> 
> BUG=594918
> 
> Committed: https://crrev.com/ee58801ba1e4a49cc2eea50d970444c7eeff9593
> Cr-Commit-Position: refs/heads/master@{#397676}

TBR=kojii@chromium.org,blink-reviews-bindings@chromium.org,haraken@chromium.o...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=594918
==========

to

==========
Revert of Implement the script parts of custom element upgrade steps. (patchset
#2 id:20001 of https://codereview.chromium.org/2035623002/ )

Reason for revert:
Speculative revert for breaking Win compile, will follow-up on the bug with more
details soon.

Original issue's description:
> Implement the script parts of custom element upgrade steps.
>
> BUG=594918
>
> Committed: https://crrev.com/ee58801ba1e4a49cc2eea50d970444c7eeff9593
> Cr-Commit-Position: refs/heads/master@{#397676}

TBR=kojii@chromium.org,blink-reviews-bindings@chromium.org,haraken@chromium.o...
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=594918

Committed: https://crrev.com/e6951b31a44e4701e982b997d6cf8a9db83f213e
Cr-Commit-Position: refs/heads/master@{#397680}
==========

[commit-bot: I haz the power, 2016-06-03 11:13:34]

Patchset 1 (id:??) landed as
https://crrev.com/e6951b31a44e4701e982b997d6cf8a9db83f213e
Cr-Commit-Position: refs/heads/master@{#397680}

[haraken, 2016-06-03 12:10:52]

LGTM