PPC: Don't MISS if you read the hole from certain FastHoley arrays.

PPC: Don't MISS if you read the hole from certain FastHoley arrays.

Port caeb9004f0bfc2a916fc63e9d27100a3110016d4

Original commit message:
If the array's map is the initial FastHoley array map, and the array prototype
chain is undisturbed and empty of elements, then keyed loads can convert the
load of a hole to undefined.

BUG=

R=dstence@us.ibm.com, michael_dawson@ca.ibm.com

Committed: https://crrev.com/63d14580d8735cee070315bcf06403fba5ef0437
Cr-Commit-Position: refs/heads/master@{#28089}

[MTBrandyberry, 2015-04-27 16:16:42]

Implement PPC support.

[michael_dawson, 2015-04-27 16:21:36]

On 2015/04/27 16:16:42, mtbrandyberry wrote:
> Implement PPC support.

lgtm.

[MTBrandyberry, 2015-04-27 16:22:23]

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

[commit-bot: I haz the power, 2015-04-27 16:22:33]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1110623002/1

[dstence, 2015-04-27 16:24:45]

On 2015/04/27 16:22:33, I haz the power (commit-bot) wrote:
> CQ is trying da patch. Follow status at
>  https://chromium-cq-status.appspot.com/patch-status/1110623002/1

lgtm

[commit-bot: I haz the power, 2015-04-27 17:01:46]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-04-27 17:02:00]

Patchset 1 (id:??) landed as
https://crrev.com/63d14580d8735cee070315bcf06403fba5ef0437
Cr-Commit-Position: refs/heads/master@{#28089}