Handle didMoveToNewDocument() for <script>

Handle didMoveToNewDocument() for <script>

This change handles inter-document move for <script>
so that it cancel script execution when it moves between documents.
As the execution relies on ScriptRunner that is owned by Document,
this cancellation is reasoable if not ideal.

TEST=append-child-adopt-node-crash.html
BUG=361011
R=dglazkov@chromium.org, eseidel@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=171160

[Hajime Morrita, 2014-04-09 01:00:09]

PTAL? A crash fix not related to imports.

[Hajime Morrita, 2014-04-09 16:55:48]

Ping? An usual crash fix.

[dglazkov, 2014-04-09 17:02:06]

lgtm

[Hajime Morrita, 2014-04-09 17:03:11]

The CQ bit was checked by morrita@chromium.org

[commit-bot: I haz the power, 2014-04-09 17:03:20]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/morrita@chromium.org/229753004/1

[commit-bot: I haz the power, 2014-04-09 18:51:54]

Change committed as 171160