PPC: [stubs] Change CallICStub to utilize the ConvertReceiverMode.

PPC: [stubs] Change CallICStub to utilize the ConvertReceiverMode.

Port d80fd48e5d3d401c10ce95cf8430e5caa9984e32

Original commit message:
    The CallICStub has call-site specific knowledge about the receiver,
    which we did not utilize; plus the CallICStub does in some case know
    whether it is about to [[Call]] a function or potentially some other
    callable. In the common case we actually know that the target is a
    function and so we can use the CallFunction builtin directly instead
    of redispatching in the Call builtin.

R=bmeurer@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=chromium:555127, v8:4413
LOG=n

Committed: https://crrev.com/ee72c4079cbabb52ab424998203e959da7235f68
Cr-Commit-Position: refs/heads/master@{#32185}

[JoranSiu, 2015-11-23 18:36:41]

On 2015/11/23 17:48:57, mtbrandyberry wrote:

lgtm

[MTBrandyberry, 2015-11-23 19:41:29]

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

[commit-bot: I haz the power, 2015-11-23 19:41:34]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1471823002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1471823002/1

[commit-bot: I haz the power, 2015-11-23 20:00:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-11-23 20:01:28]

Patchset 1 (id:??) landed as
https://crrev.com/ee72c4079cbabb52ab424998203e959da7235f68
Cr-Commit-Position: refs/heads/master@{#32185}