Use TO_OBJECT_INLINE a bit more

Use TO_OBJECT_INLINE a bit more

We were using ToObject in a lot of places where the common case is that
we already have an object. By changing to TO_OBJECT_INLINE we don't
have to go through 5 different if statements before falling through.

We were also calling ToObject too many times in DefineObjectProperty
where we already know that obj is an object.

BUG=None
LOG=N

Committed: https://crrev.com/2184431f4cc660e39610f4d17927e409c276e104
Cr-Commit-Position: refs/heads/master@{#27355}

[arv (Not doing code reviews), 2015-03-19 22:24:50]

arv@chromium.org changed reviewers:
+ adamk@chromium.org, rossberg@chromium.org

[arv (Not doing code reviews), 2015-03-19 22:24:50]

PTAL

[adamk, 2015-03-20 08:21:53]

lgtm, nice cleanup

[arv (Not doing code reviews), 2015-03-20 14:36:31]

The CQ bit was checked by arv@chromium.org

[arv (Not doing code reviews), 2015-03-20 14:36:33]

The CQ bit was unchecked by arv@chromium.org

[arv (Not doing code reviews), 2015-03-20 16:59:32]

The CQ bit was checked by arv@chromium.org

[commit-bot: I haz the power, 2015-03-20 16:59:46]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1019413002/1

[Yang, 2015-03-20 17:06:46]

The CQ bit was unchecked by yangguo@chromium.org

[Yang, 2015-03-23 08:07:00]

The CQ bit was checked by yangguo@chromium.org

[commit-bot: I haz the power, 2015-03-23 08:07:11]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1019413002/1

[commit-bot: I haz the power, 2015-03-23 08:41:52]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-03-23 08:42:09]

Patchset 1 (id:??) landed as
https://crrev.com/2184431f4cc660e39610f4d17927e409c276e104
Cr-Commit-Position: refs/heads/master@{#27355}