Version 3.28.2 (based on bleeding_edge revision r21987)

Remove bogus assertions in HCompareObjectEqAndBranch (Chromium issue 387636).

Do not eagerly update allow_osr_at_loop_nesting_level (Chromium issue 387599).

Set host_arch to ia32 on machines with a 32bit userland but a 64bit kernel (Chromium issue 368384).

Map/Set: Implement constructor parameter handling (issue 3398).

Performance and stability improvements on all platforms.

git-svn-id: https://v8.googlecode.com/svn/trunk@21989 ce2b1a6d-e550-0410-aec6-3dcde31c8c00