Oilpan: Validate pointers stored in CrossThreadPersistent

Oilpan: Validate pointers stored in CrossThreadPersistent

This CL adds checkPointer() to all pointer updates of CrossThreadPersistent.
The checkPointer() verifies that the pointer is a pointer to an on-heap object.

BUG=475801
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=196384

[haraken, 2015-05-21 11:11:50]

haraken@chromium.org changed reviewers:
+ keishi@chromium.org, oilpan-reviews@chromium.org

[haraken, 2015-05-21 11:11:51]

PTAL

[keishi, 2015-05-21 11:16:18]

The CQ bit was checked by keishi@chromium.org

[keishi, 2015-05-21 11:16:18]

lgtm

[commit-bot: I haz the power, 2015-05-21 11:16:27]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1143323004/1

[commit-bot: I haz the power, 2015-05-21 13:46:43]

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

[commit-bot: I haz the power, 2015-05-21 13:46:44]

Try jobs failed on following builders:
  linux_blink_rel on tryserver.blink (JOB_FAILED,
http://build.chromium.org/p/tryserver.blink/builders/linux_blink_rel/builds/6...)

[haraken, 2015-05-26 00:01:42]

The CQ bit was checked by haraken@chromium.org

[commit-bot: I haz the power, 2015-05-26 00:01:48]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1143323004/1

[haraken, 2015-06-03 07:46:07]

I rewrote the checkPointer with Heap::isHeapObjectAlive(). Landing.

[haraken, 2015-06-03 07:46:11]

The CQ bit was checked by haraken@chromium.org

[haraken, 2015-06-03 07:46:11]

The patchset sent to the CQ was uploaded after l-g-t-m from keishi@chromium.org
Link to the patchset: https://codereview.chromium.org/1143323004/#ps60001
(title: " ")

[commit-bot: I haz the power, 2015-06-03 07:46:37]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1143323004/60001

[commit-bot: I haz the power, 2015-06-03 09:05:18]

Committed patchset #4 (id:60001) as
https://src.chromium.org/viewvc/blink?view=rev&revision=196384