Fix bug in Object.freeze and Object.seal when Array.prototype or Object.prototype is changed (issue 842).

Update Array.splice to follow Safari and Firefox when called with zero arguments.

Fix a missing live register when breaking at keyed loads on ARM.

Performance improvements on all platforms.


git-svn-id: http://v8.googlecode.com/svn/trunk@5388 ce2b1a6d-e550-0410-aec6-3dcde31c8c00