This includes the following changes:
* Bring instance type mapping up to date.
* Enable loading of maps without available meta-map.
* Add missing IntSize() method.
* Fix reference to Code.CODE_ALIGNMENT_MASK.
* Add alignment checks for objects and maps.

R=vegorov@chromium.org

Review URL: http://codereview.chromium.org/9075003

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10344 ce2b1a6d-e550-0410-aec6-3dcde31c8c00