Do not save script object on the class constructor.

Do not save script object on the class constructor.

We don't need it, as we can grab it from the shared function info.
Having it triggers an assertion if we define classes in native JS.

R=bmeurer@chromium.org, rossberg@chromium.org

Committed: https://crrev.com/abc12df33c0dd188441acbf1646048111bdaf1be
Cr-Commit-Position: refs/heads/master@{#30134}

[Yang, 2015-08-12 11:56:14]

yangguo@chromium.org changed reviewers:
+ mlippautz@chromium.org

[rossberg, 2015-08-12 12:31:27]

lgtm

[Michael Lippautz, 2015-08-12 12:39:53]

heap lgtm

[Benedikt Meurer, 2015-08-12 12:40:05]

LGTM, nice catch!

[Yang, 2015-08-12 12:40:32]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-08-12 12:40:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1290703002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1290703002/1

[commit-bot: I haz the power, 2015-08-12 13:06:08]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-12 13:06:34]

Patchset 1 (id:??) landed as
https://crrev.com/abc12df33c0dd188441acbf1646048111bdaf1be
Cr-Commit-Position: refs/heads/master@{#30134}