Version 3.27.24 (based on bleeding_edge revision r21750)

Fix invalid attributes when generalizing because of incompatible map change (Chromium issue 382143).

Fix missing smi check in inlined indexOf/lastIndexOf (Chromium issue 382513).

Performance and stability improvements on all platforms.

git-svn-id: https://v8.googlecode.com/svn/trunk@21751 ce2b1a6d-e550-0410-aec6-3dcde31c8c00