Update V8 to version 5.5.270.

Update V8 to version 5.5.270.

Summary of changes available at:
https://chromium.googlesource.com/v8/v8/+log/3721449f..32e82b73

Please follow these instructions for assigning/CC'ing issues:
https://github.com/v8/v8/wiki/Triaging%20issues

Please close rolling in case of a roll revert:
https://v8-roll.appspot.com/
This only works with a Google account.

CQ_INCLUDE_TRYBOTS=master.tryserver.blink:linux_precise_blink_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel

TBR=hablich@chromium.org,machenbach@chromium.org,littledan@chromium.org,vogelheim@chromium.org

[v8-autoroll, 2016-09-22 20:49:12]

The CQ bit was checked by v8-autoroll@chromium.org

[commit-bot: I haz the power, 2016-09-22 20:49:51]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-22 22:09:46]

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

[commit-bot: I haz the power, 2016-09-22 22:09:46]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[v8-autoroll, 2016-09-22 22:15:54]

The CQ bit was checked by v8-autoroll@chromium.org

[commit-bot: I haz the power, 2016-09-22 22:16:33]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-22 23:37:00]

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

[commit-bot: I haz the power, 2016-09-22 23:37:01]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[v8-autoroll, 2016-09-22 23:45:59]

The CQ bit was checked by v8-autoroll@chromium.org

[commit-bot: I haz the power, 2016-09-22 23:46:28]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-23 00:52:18]

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

[commit-bot: I haz the power, 2016-09-23 00:52:19]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[v8-autoroll, 2016-09-23 01:00:52]

The CQ bit was checked by v8-autoroll@chromium.org

[commit-bot: I haz the power, 2016-09-23 01:01:16]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-23 02:16:49]

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

[commit-bot: I haz the power, 2016-09-23 02:16:50]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[v8-autoroll, 2016-09-23 02:30:56]

The CQ bit was checked by v8-autoroll@chromium.org

[commit-bot: I haz the power, 2016-09-23 02:31:57]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-23 03:40:10]

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

[commit-bot: I haz the power, 2016-09-23 03:40:10]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[v8-autoroll, 2016-09-23 03:45:55]

The CQ bit was checked by v8-autoroll@chromium.org

[commit-bot: I haz the power, 2016-09-23 03:46:11]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-23 04:41:05]

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

[commit-bot: I haz the power, 2016-09-23 04:41:06]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[v8-autoroll, 2016-09-23 04:45:54]

The CQ bit was checked by v8-autoroll@chromium.org

[commit-bot: I haz the power, 2016-09-23 04:46:09]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-09-23 05:46:32]

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

[commit-bot: I haz the power, 2016-09-23 05:46:33]

Try jobs failed on following builders:
  win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

[Michael Hablich, 2016-09-23 05:49:57]

On 2016/09/23 05:46:33, commit-bot: I haz the power wrote:
> Try jobs failed on following builders:
>   win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
>
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)

Roller stopped

[Michael Hablich, 2016-09-23 06:04:51]

On 2016/09/23 05:49:57, Hablich wrote:
> On 2016/09/23 05:46:33, commit-bot: I haz the power wrote:
> > Try jobs failed on following builders:
> >   win_chromium_x64_rel_ng on master.tryserver.chromium.win (JOB_FAILED,
> >
>
http://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_...)
> 
> Roller stopped

Reverts landed. Merge to roll branch greatly appreciated because I am not at a
computer.