Revert of Revert of Update V8 to version 4.3.10.

Revert of Revert of Update V8 to version 4.3.10. (patchset #1 id:1 of https://codereview.chromium.org/961143003/)

Reason for revert:
This revert also didn't help. Relanding. Maybe something happened on these bots? The output of one test suggests to reinstall the build deps:
http://build.chromium.org/p/chromium.linux/builders/Linux%20Tests%20%28dbg%29%281%29%2832%29/builds/10450/steps/gfx_unittests/logs/PlatformFontLinuxTest.DefaultFont

It's of course odd that this problem exists on different bots...

Original issue's description:
> Revert of Update V8 to version 4.3.10. (patchset #1 id:1 of https://codereview.chromium.org/965873003/)
>
> Reason for revert:
> Speculative revert to see whether this affects some failing tests on linux:
>
> http://build.chromium.org/p/chromium.linux/builders/Linux%20Tests%20%28dbg%29%281%29%2832%29
>
> The two other Chromium commits in the narrowed-down range were reverted but that didn't help.
>
> Original issue's description:
> > Update V8 to version 4.3.10.
> >
> > Summary of changes available at:
> > https://chromium.googlesource.com/v8/v8/+log/27a38796..627ffe9a
> >
> > Please follow these instructions for assigning/CC'ing issues:
> > https://code.google.com/p/v8-wiki/wiki/TriagingIssues
> >
> > TBR=machenbach@chromium.org
> >
> > Committed: https://crrev.com/a4c7ab8af2530c04fb32939585d3b021aa7d9363
> > Cr-Commit-Position: refs/heads/master@{#318556}
>
> TBR=machenbach@chromium.org,v8-autoroll@chromium.org
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
>
> Committed: https://crrev.com/816e8760358a24ee2ddf5c748aa310caf4eab730
> Cr-Commit-Position: refs/heads/master@{#318603}

TBR=v8-autoroll@chromium.org,qyearsley@chromium.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true

Committed: https://crrev.com/36946bcce25da9c26cf955347354b766e8ebbf04
Cr-Commit-Position: refs/heads/master@{#318607}

[Michael Achenbach, 2015-02-28 14:23:53]

Created Revert of Revert of Update V8 to version 4.3.10.

[commit-bot: I haz the power, 2015-02-28 14:24:12]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/969563002/1

[commit-bot: I haz the power, 2015-02-28 14:24:27]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-02-28 14:25:19]

Patchset 1 (id:??) landed as
https://crrev.com/36946bcce25da9c26cf955347354b766e8ebbf04
Cr-Commit-Position: refs/heads/master@{#318607}