Version 3.23.16

Array builtins need to be prevented from changing frozen objects, and changing structure on sealed objects (Chromium issue 299979).

Performance and stability improvements on all platforms.

git-svn-id: https://v8.googlecode.com/svn/trunk@18178 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/trunk' into trunk