Version 3.28.59 (based on bleeding_edge revision r22888)

Removed GetConstructor from the API. Instead either get the "constructor" property stored in the prototype, or keep a side-table.

Enable ES6 Symbols by default (issue 2158).

Performance and stability improvements on all platforms.

git-svn-id: https://v8.googlecode.com/svn/trunk@22891 ce2b1a6d-e550-0410-aec6-3dcde31c8c00