add blink_disable_partition_allocator for memory profiler.

add blink_disable_partition_allocator for memory profiler.

PartitionAlloc manages memory chunks which are pre-allocated
and re-assigned to the caller which requests memory allocation.
so the top point of stack unwinding is always inside PartitionAlloc
in blink. this can make profiler know wrong allocation point.

if this gyp flag is set, blink uses base allocator.
so that it can show exact callstack where actual allocation is
requested.

Bug=None

Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=178419

[JungJik, 2014-07-18 02:19:38]

I made new same patch due to the wrong base url.
I am sorry about this. please take a look again.

[abarth-chromium, 2014-07-18 03:07:57]

lgtm

[abarth-chromium, 2014-07-18 03:07:59]

The CQ bit was checked by abarth@chromium.org

[commit-bot: I haz the power, 2014-07-18 03:08:23]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jungjik.lee@samsung.com/399333002/1

[commit-bot: I haz the power, 2014-07-18 04:13:06]

FYI, CQ is re-trying this CL (attempt #1).
The failing builders are:
  android_blink_compile_dbg on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/android_blink_compile_db...)
  android_blink_compile_rel on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/android_blink_compile_re...)

[commit-bot: I haz the power, 2014-07-18 04:25:20]

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

[commit-bot: I haz the power, 2014-07-18 04:25:21]

Try jobs failed on following builders:
  android_blink_compile_dbg on tryserver.blink
(http://build.chromium.org/p/tryserver.blink/builders/android_blink_compile_db...)

[JungJik, 2014-07-18 06:47:00]

The CQ bit was checked by jungjik.lee@samsung.com

[commit-bot: I haz the power, 2014-07-18 06:47:53]

CQ is trying da patch. Follow status at
 https://chromium-status.appspot.com/cq/jungjik.lee@samsung.com/399333002/1

[commit-bot: I haz the power, 2014-07-18 06:55:21]

Change committed as 178419