Revert a series of wrong fixes for crbug.com/361011

Revert a series of wrong fixes for crbug.com/361011

Revert "Elaborate error handling on ScriptLoader::finishLoading()"
>  Elaborate error handling on ScriptLoader::finishLoading()
>
>    This is a follow up for r170702, which considered only about
>    dynamically added <script>. This change covers parser-added <script>.
>
>    TEST=adopt-node-crash.html
>    BUG=365229, 364770
>    R=esprehn@chromium.org, eseidel@chromium.org
>
>    Review URL: https://codereview.chromium.org/248013002
>
>    git-svn-id: svn://svn.chromium.org/blink/trunk@172804 bbb929c8-8fbe-4397-9dbb-9b2b20218538

Revert "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
>
>    Review URL: https://codereview.chromium.org/229753004
>
>    git-svn-id: svn://svn.chromium.org/blink/trunk@171160 bbb929c8-8fbe-4397-9dbb-9b2b20218538

BUG=365529, 364770, 361011, 368551
TBR=eseidel@chromium.org, japhet@chromium.org, dglazkov@chromium.org

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=174075

[Hajime Morrita, 2014-05-15 09:17:45]

The CQ bit was checked by morrita@chromium.org

[commit-bot: I haz the power, 2014-05-15 09:18:00]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/morrita@chromium.org/288033006/1

[commit-bot: I haz the power, 2014-05-15 10:57:52]

Change committed as 174075