Revert of Continue learning for calls in optimized code when we have no type feedback.

Revert of Continue learning for calls in optimized code when we have no type feedback. (patchset #4 id:60001 of https://codereview.chromium.org/868453005/)

Reason for revert:
Serializer tests broke. Need to debug and fix.

Original issue's description:
> Continue learning for calls in optimized code when we have no type feedback.
>
> Based on CL https://codereview.chromium.org/871063002/ which needs to land first.
>
> BUG=
>
> Committed: https://crrev.com/f5f2692b5ff70ac3cd06a903b7846174b97a2e55
> Cr-Commit-Position: refs/heads/master@{#26292}

TBR=verwaest@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Committed: https://crrev.com/f605f1c2239f254cbef65ce3149fb2e4cf02dcd7
Cr-Commit-Position: refs/heads/master@{#26293}

[mvstanton, 2015-01-27 13:06:24]

Created Revert of Continue learning for calls in optimized code when we have no
type feedback.

[commit-bot: I haz the power, 2015-01-27 13:06:51]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/878103002/1

[commit-bot: I haz the power, 2015-01-27 13:07:02]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-27 13:07:20]

Patchset 1 (id:??) landed as
https://crrev.com/f605f1c2239f254cbef65ce3149fb2e4cf02dcd7
Cr-Commit-Position: refs/heads/master@{#26293}