Version 3.30.7 (based on bleeding_edge revision r24503)

Fix computation of UTC time from local time at DST change points (issue 3116, Chromium issues 415424, 417640).

Convert `obj` ToObject in Object.keys() (issue 3587).

Performance and stability improvements on all platforms.

git-svn-id: https://v8.googlecode.com/svn/trunk@24504 ce2b1a6d-e550-0410-aec6-3dcde31c8c00