Re-enabled and fixed issue with array bounds check elimination (Chromium issue 132114).

Fixed Debug::Break crash. (Chromium issue 131642)

Added optimizing compiler support for JavaScript getters.

Performance and stability improvements on all platforms.

git-svn-id: http://v8.googlecode.com/svn/trunk@12029 ce2b1a6d-e550-0410-aec6-3dcde31c8c00