Update V8 to version 3.26.5 (based on bleeding_edge revision r20452).

Update V8 to version 3.26.5 (based on bleeding_edge revision r20452).

[re-land of 261450]

> Revert 261450 "Update V8 to version 3.26.5 (based on bleeding_ed..."
> 
> Failing on all bots (http://build.chromium.org/p/chromium.linux/builders/Linux%20Tests/builds/10031)
> 
> 
> 
> > Update V8 to version 3.26.5 (based on bleeding_edge revision r20452).
> > 
> > TBR=jochen@chromium.org
> > NOTRY=true
> > 
> > Review URL: https://codereview.chromium.org/223403002
> 
> TBR=machenbach@chromium.org
> 
> Review URL: https://codereview.chromium.org/222583004

TBR=mallinath@chromium.org,jochen@chromium.org,machenbach@chromium.org

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=261523

[ncarter (slow), 2014-04-03 21:01:26]

Committed patchset #1 manually as r261523.

[esprehn, 2014-04-04 04:40:47]

This is making fast/js/const.html fail on all platforms.