Revert of Use shared container to manage imports/exports.

Revert of Use shared container to manage imports/exports. (patchset #2 id:20001 of https://codereview.chromium.org/1143993003/)

Reason for revert:
Breaks nosnap bots

Original issue's description:
> Use shared container to manage imports/exports.
>
> Also changed string.js and math.js to adapt this change.
>
> R=jkummerow@chromium.org
>
> Committed: https://crrev.com/e25058b0b7b9831162579564fc8935d568c1ecdd
> Cr-Commit-Position: refs/heads/master@{#28521}

TBR=yangguo@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/1ec55616854380350e8f7f29dc5a5eb7bd9ecec5
Cr-Commit-Position: refs/heads/master@{#28523}

[Jakob Kummerow, 2015-05-20 15:59:18]

Created Revert of Use shared container to manage imports/exports.

[commit-bot: I haz the power, 2015-05-20 15:59:35]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1144163002/1

[commit-bot: I haz the power, 2015-05-20 16:00:00]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-05-20 16:00:18]

Patchset 1 (id:??) landed as
https://crrev.com/1ec55616854380350e8f7f29dc5a5eb7bd9ecec5
Cr-Commit-Position: refs/heads/master@{#28523}