Refactor HCheckMaps to have a private constructor, removing duplicated code and simplifying calls in clients.
Ignore bsuite directory.

Review URL: https://codereview.chromium.org/14367023

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14362 ce2b1a6d-e550-0410-aec6-3dcde31c8c00