PPC: [ic] Also collect known map for relational comparison.

PPC: [ic] Also collect known map for relational comparison.

Port e56f265f6d41fadbcea2be65d9b573bad8b4709d

Original commit message:
    Previously we only collected the known map for equality comparisons. But
    if we also collect it for relational comparisons, we can inline a fast
    path of ToPrimitive on the objects, which is especially interesting
    since both sides have the same map.

    For now we only inline a very limited subset of ToPrimitive in
    Crankshaft, which is when the receiver map (and its prototype chain)
    doesn't have @@toPrimitive, and both valueOf and toString are the
    default versions on the %ObjectPrototype%. In this case the relational
    comparison would reduce to a string comparison of "[object CLASS]" with
    itself and so we can reduce that to a boolean constant plus map checks
    on both left and right hand side, plus code dependencies on the
    prototype chain. This repairs the regression on box2d.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, dstence@us.ibm.com
BUG=chromium:534200
LOG=n

Committed: https://crrev.com/394f3cf3ebf3cd5c028d6bf8041ebe4c33d949ad
Cr-Commit-Position: refs/heads/master@{#30869}

[MTBrandyberry, 2015-09-22 18:50:07]

The CQ bit was checked by mbrandy@us.ibm.com to run a CQ dry run

[commit-bot: I haz the power, 2015-09-22 18:50:28]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1358063005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1358063005/1

[michael_dawson, 2015-09-22 18:55:47]

On 2015/09/22 18:50:28, commit-bot: I haz the power wrote:
> Dry run: CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/1358063005/1
> View timeline at
>  https://chromium-cq-status.appspot.com/patch-timeline/1358063005/1

lgtm

[commit-bot: I haz the power, 2015-09-22 19:16:26]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-09-22 19:16:27]

Dry run: This issue passed the CQ dry run.

[MTBrandyberry, 2015-09-22 19:17:55]

The CQ bit was checked by mbrandy@us.ibm.com

[commit-bot: I haz the power, 2015-09-22 19:18:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1358063005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1358063005/1

[commit-bot: I haz the power, 2015-09-22 19:19:57]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-09-22 19:20:14]

Patchset 1 (id:??) landed as
https://crrev.com/394f3cf3ebf3cd5c028d6bf8041ebe4c33d949ad
Cr-Commit-Position: refs/heads/master@{#30869}