Version 3.28.17 (based on bleeding_edge revision r22261)

MIPS: Fix computed properties on object literals with a double as propertyname (Chromium issue 390732).

Performance and stability improvements on all platforms.

git-svn-id: https://v8.googlecode.com/svn/trunk@22263 ce2b1a6d-e550-0410-aec6-3dcde31c8c00