PPC: Move hashmap into src/base.

PPC: Move hashmap into src/base.

Port 2fd55667a63a1428e9501336e5cd97f5431aa607

Original commit message:

    We ported hashmap.h into libsampler as a workaround before, so the main focus of
    this patch is to reduce code duplication. This patch moves the hashmap into
    src/base as well as creates DefaultAllocationPolicy using malloc and free.

R=lpy@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com, michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:5050
LOG=N

Committed: https://crrev.com/c7cddee678c8ac89ad4683c38253569bf677eb17
Cr-Commit-Position: refs/heads/master@{#36900}

[JaideepBajwa, 2016-06-10 17:24:25]

PTAL

[john.yan, 2016-06-10 17:25:52]

lgtm

[JaideepBajwa, 2016-06-10 17:26:35]

The CQ bit was checked by bjaideep@ca.ibm.com

[commit-bot: I haz the power, 2016-06-10 17:26:39]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/2057263002/1

[commit-bot: I haz the power, 2016-06-10 17:53:54]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-06-10 17:54:49]

Description was changed from

==========
PPC: Move hashmap into src/base.

Port 2fd55667a63a1428e9501336e5cd97f5431aa607

Original commit message:

    We ported hashmap.h into libsampler as a workaround before, so the main
focus of
    this patch is to reduce code duplication. This patch moves the hashmap into
    src/base as well as creates DefaultAllocationPolicy using malloc and free.

R=lpy@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:5050
LOG=N
==========

to

==========
PPC: Move hashmap into src/base.

Port 2fd55667a63a1428e9501336e5cd97f5431aa607

Original commit message:

    We ported hashmap.h into libsampler as a workaround before, so the main
focus of
    this patch is to reduce code duplication. This patch moves the hashmap into
    src/base as well as creates DefaultAllocationPolicy using malloc and free.

R=lpy@chromium.org, joransiu@ca.ibm.com, jyan@ca.ibm.com,
michael_dawson@ca.ibm.com, mbrandy@us.ibm.com

BUG=v8:5050
LOG=N

Committed: https://crrev.com/c7cddee678c8ac89ad4683c38253569bf677eb17
Cr-Commit-Position: refs/heads/master@{#36900}
==========

[commit-bot: I haz the power, 2016-06-10 17:54:50]

Patchset 1 (id:??) landed as
https://crrev.com/c7cddee678c8ac89ad4683c38253569bf677eb17
Cr-Commit-Position: refs/heads/master@{#36900}