Revert "In PrepareForBreakPoints, also purge shared function info not referenced by functions."

This reverts commit r24964.

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/687163002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24966 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Reland "X87: Classes: Add basic support for properties."

TBR=machenbach@chromium.org

Review URL: https://codereview.chromium.org/687163003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24967 ce2b1a6d-e550-0410-aec6-3dcde31c8c00