Revert "MIPS: Vector-ICs - speed towards the monomorphic exit as quickly as possible."

Revert "MIPS: Vector-ICs - speed towards the monomorphic exit as quickly as possible."

Reason for revert:
Test failures in string-index and regress-1187524.

This reverts commit b45a664f7bc8155d226df7efebd23fb59e5c6162.

BUG=

Committed: https://crrev.com/6e17f661c17cd5e53d9ca063948a33f6409a066d
Cr-Commit-Position: refs/heads/master@{#27769}

[paul.l..., 2015-04-11 03:09:30]

paul.lind@imgtec.com changed reviewers:
+ akos.palfi@imgtec.com, balazs.kilvady@imgtec.com, mvstanton@chromium.org

[paul.l..., 2015-04-11 03:09:31]

Looks like a problem with a prior CL, as I sure do not see the bug here.

[akos.palfi.imgtec, 2015-04-11 09:12:48]

lgtm

[paul.l..., 2015-04-11 14:58:11]

The CQ bit was checked by paul.lind@imgtec.com

[commit-bot: I haz the power, 2015-04-11 14:58:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1050943004/1

[commit-bot: I haz the power, 2015-04-11 15:23:27]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-11 15:23:37]

Patchset 1 (id:??) landed as
https://crrev.com/6e17f661c17cd5e53d9ca063948a33f6409a066d
Cr-Commit-Position: refs/heads/master@{#27769}