Exposed eternal handle api.

Bugfix to solve issues with enabling V8 typed arrays in Blink.

Fixed Array index dehoisting.  (Chromium issue 264203)

Updated Array Iterator to use numeric indexes (issue 2818)

Return start/end profiling time in microseconds instead of milliseconds (issue 2824)

Performance and stability improvements on all platforms.

git-svn-id: http://v8.googlecode.com/svn/trunk@16093 ce2b1a6d-e550-0410-aec6-3dcde31c8c00