The IC stub is completely generic, so there will only be one such stub
in the system.

Added a new overloaded version of the macro assembler RecordWrite
method for cases where we have the address we store to computed up
front.

Review URL: http://codereview.chromium.org/2804029

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4991 ce2b1a6d-e550-0410-aec6-3dcde31c8c00