Update V8 to version 4.2.40 (based on 9b60e894828532a22b272502128de870b36a6aa7).

Update V8 to version 4.2.40 (based on 9b60e894828532a22b272502128de870b36a6aa7).

TBR=machenbach@chromium.org

Committed: https://crrev.com/aa3496f0f08caae6fed1fd58ca93b9ec7af56ca7
Cr-Commit-Position: refs/heads/master@{#314055}

[v8-autoroll, 2015-01-31 02:06:34]

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

[commit-bot: I haz the power, 2015-01-31 02:07:57]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/867163004/1

[commit-bot: I haz the power, 2015-01-31 08:13:07]

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

[commit-bot: I haz the power, 2015-01-31 08:13:07]

Try jobs failed on following builders:
  win8_chromium_gn_rel on tryserver.chromium.win
(http://build.chromium.org/p/tryserver.chromium.win/builders/win8_chromium_gn_...)

[Michael Achenbach, 2015-01-31 14:23:13]

The CQ bit was checked by machenbach@chromium.org

[commit-bot: I haz the power, 2015-01-31 14:24:03]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/867163004/1

[commit-bot: I haz the power, 2015-01-31 15:13:25]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-01-31 15:14:12]

Patchset 1 (id:??) landed as
https://crrev.com/aa3496f0f08caae6fed1fd58ca93b9ec7af56ca7
Cr-Commit-Position: refs/heads/master@{#314055}