Native context: do not hold onto helper functions on the utils object.

Native context: do not hold onto helper functions on the utils object.

This is to avoid holding onto the function context of prologue.js.

R=cbruni@chromium.org

Committed: https://crrev.com/55a2f5a50af58f8417f5a92a1c04ad550ed3a01b
Cr-Commit-Position: refs/heads/master@{#30246}

[Camillo Bruni, 2015-08-19 10:30:08]

lgtm

[Yang, 2015-08-19 10:45:58]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-08-19 10:46:10]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1285133009/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1285133009/1

[commit-bot: I haz the power, 2015-08-19 11:30:26]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-08-19 11:30:36]

Patchset 1 (id:??) landed as
https://crrev.com/55a2f5a50af58f8417f5a92a1c04ad550ed3a01b
Cr-Commit-Position: refs/heads/master@{#30246}