Update V8 to version 5.4.520.

Update V8 to version 5.4.520.

Summary of changes available at:
https://chromium.googlesource.com/v8/v8/+log/b4f9789f..5b52c69a

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

Committed: https://crrev.com/ac33f5722fedc45a045804c628dda805cfede5a2
Cr-Commit-Position: refs/heads/master@{#414414}

[v8-autoroll, 2016-08-25 10:01:27]

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

[commit-bot: I haz the power, 2016-08-25 10:02:27]

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, 2016-08-25 10:05:03]

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

[commit-bot: I haz the power, 2016-08-25 10:05:03]

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

[v8-autoroll, 2016-08-25 10:15:49]

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

[commit-bot: I haz the power, 2016-08-25 10:16:11]

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, 2016-08-25 13:10:06]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-25 13:12:28]

Description was changed from

==========
Update V8 to version 5.4.520.

Summary of changes available at:
https://chromium.googlesource.com/v8/v8/+log/b4f9789f..5b52c69a

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,vogel...
==========

to

==========
Update V8 to version 5.4.520.

Summary of changes available at:
https://chromium.googlesource.com/v8/v8/+log/b4f9789f..5b52c69a

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,vogel...

Committed: https://crrev.com/ac33f5722fedc45a045804c628dda805cfede5a2
Cr-Commit-Position: refs/heads/master@{#414414}
==========

[commit-bot: I haz the power, 2016-08-25 13:12:29]

Patchset 1 (id:??) landed as
https://crrev.com/ac33f5722fedc45a045804c628dda805cfede5a2
Cr-Commit-Position: refs/heads/master@{#414414}