PPC: InstanceOfStub incorrectly interprets the hole as a prototype.

PPC: InstanceOfStub incorrectly interprets the hole as a prototype.

Port 2aa070be4fd2960df98905b254f12ed801ef26cd

Original commit message:
    Repair this to match what the runtime correctly does, by first checking if the
    function is a constructor before we access the prototype.

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/3a903c424b57341c2bb98f69dc0b4225864ea50e
Cr-Commit-Position: refs/heads/master@{#34869}

[MTBrandyberry, 2016-03-17 17:12:06]

PTAL

[MTBrandyberry, 2016-03-17 17:13:37]

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

[commit-bot: I haz the power, 2016-03-17 17:13:43]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1811013002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1811013002/1

[commit-bot: I haz the power, 2016-03-17 17:47:53]

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

[commit-bot: I haz the power, 2016-03-17 17:47:54]

Dry run: This issue passed the CQ dry run.

[john.yan, 2016-03-17 18:04:55]

lgtm

[MTBrandyberry, 2016-03-17 18:10:45]

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

[commit-bot: I haz the power, 2016-03-17 18:10:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1811013002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1811013002/1

[commit-bot: I haz the power, 2016-03-17 18:13:21]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-17 18:14:25]

Description was changed from

==========
PPC: InstanceOfStub incorrectly interprets the hole as a prototype.

Port 2aa070be4fd2960df98905b254f12ed801ef26cd

Original commit message:
    Repair this to match what the runtime correctly does, by first checking if
the
    function is a constructor before we access the prototype.

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=
==========

to

==========
PPC: InstanceOfStub incorrectly interprets the hole as a prototype.

Port 2aa070be4fd2960df98905b254f12ed801ef26cd

Original commit message:
    Repair this to match what the runtime correctly does, by first checking if
the
    function is a constructor before we access the prototype.

R=mvstanton@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=

Committed: https://crrev.com/3a903c424b57341c2bb98f69dc0b4225864ea50e
Cr-Commit-Position: refs/heads/master@{#34869}
==========

[commit-bot: I haz the power, 2016-03-17 18:14:26]

Patchset 1 (id:??) landed as
https://crrev.com/3a903c424b57341c2bb98f69dc0b4225864ea50e
Cr-Commit-Position: refs/heads/master@{#34869}