Move LookupResult into crankshaft as that's now the only place where it's still used

Move LookupResult into crankshaft as that's now the only place where it's still used
Additionally handlify the "transition" field so that GC can stop caring about it.

BUG=

Committed: https://crrev.com/7138634d5aadb5ae724daed629fae0b1623fbe0d
Cr-Commit-Position: refs/heads/master@{#26718}

[Toon Verwaest, 2015-02-18 11:57:28]

verwaest@chromium.org changed reviewers:
+ ishell@chromium.org

[Toon Verwaest, 2015-02-18 11:57:29]

PTAL

[Igor Sheludko, 2015-02-18 12:33:31]

lgtm

[Toon Verwaest, 2015-02-18 12:59:02]

The CQ bit was checked by verwaest@chromium.org

[commit-bot: I haz the power, 2015-02-18 12:59:45]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/935033003/1

[commit-bot: I haz the power, 2015-02-18 13:21:42]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-18 13:21:59]

Patchset 1 (id:??) landed as
https://crrev.com/7138634d5aadb5ae724daed629fae0b1623fbe0d
Cr-Commit-Position: refs/heads/master@{#26718}