Version 3.29.16 (based on bleeding_edge revision r23326)

Fix issue with numeric property names (issue 3507).

Add back the duplicate property checker (issue 3498).

Performance and stability improvements on all platforms.

git-svn-id: https://v8.googlecode.com/svn/trunk@23327 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Merge remote-tracking branch 'upstream/trunk' into trunk