PPC: Remove usages of Heap::NewSpaceStart and its external reference

PPC: Remove usages of Heap::NewSpaceStart and its external reference

Port f2a585935fa070d2b4fb78389045d4df5253dd96

Original commit message:
    Replace the uses with proper page flag lookups.

R=mlippautz@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com
BUG=chromium:581412
LOG=N
TEST=mjsunit/allocation-site-info

Committed: https://crrev.com/5a09c0c0dbbde5307b8306bef8c5b8a566c0ed3c
Cr-Commit-Position: refs/heads/master@{#35172}

[MTBrandyberry, 2016-03-31 16:10:15]

PTAL

[MTBrandyberry, 2016-03-31 16:10:19]

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

[commit-bot: I haz the power, 2016-03-31 16:10:29]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1845753005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1845753005/1

[Michael Lippautz, 2016-03-31 16:22:23]

lgtm, thanks!

[commit-bot: I haz the power, 2016-03-31 16:33:24]

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

[commit-bot: I haz the power, 2016-03-31 16:33:25]

Dry run: This issue passed the CQ dry run.

[MTBrandyberry, 2016-03-31 16:44:22]

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

[commit-bot: I haz the power, 2016-03-31 16:44:24]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1845753005/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1845753005/1

[commit-bot: I haz the power, 2016-03-31 16:46:25]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-03-31 16:46:50]

Description was changed from

==========
PPC: Remove usages of Heap::NewSpaceStart and its external reference

Port f2a585935fa070d2b4fb78389045d4df5253dd96

Original commit message:
    Replace the uses with proper page flag lookups.

R=mlippautz@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=chromium:581412
LOG=N
TEST=mjsunit/allocation-site-info
==========

to

==========
PPC: Remove usages of Heap::NewSpaceStart and its external reference

Port f2a585935fa070d2b4fb78389045d4df5253dd96

Original commit message:
    Replace the uses with proper page flag lookups.

R=mlippautz@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com
BUG=chromium:581412
LOG=N
TEST=mjsunit/allocation-site-info

Committed: https://crrev.com/5a09c0c0dbbde5307b8306bef8c5b8a566c0ed3c
Cr-Commit-Position: refs/heads/master@{#35172}
==========

[commit-bot: I haz the power, 2016-03-31 16:46:51]

Patchset 1 (id:??) landed as
https://crrev.com/5a09c0c0dbbde5307b8306bef8c5b8a566c0ed3c
Cr-Commit-Position: refs/heads/master@{#35172}