Version 3.29.20 (based on bleeding_edge revision r23421)

Handle empty allocation list in CodeRange properly (issue 3540, Chromium issue 407566).

Fixed inlining of constant values (issue 3529).

Performance and stability improvements on all platforms.

git-svn-id: https://v8.googlecode.com/svn/trunk@23426 ce2b1a6d-e550-0410-aec6-3dcde31c8c00