Update deprecated maps before generating optimized code.

Review URL: https://chromiumcodereview.appspot.com/14847008

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14522 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Adding fast path for generalizing maps.

Review URL: https://chromiumcodereview.appspot.com/14629005

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14523 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
Cleanup IC heuristics.

Review URL: https://chromiumcodereview.appspot.com/14611006

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@14524 ce2b1a6d-e550-0410-aec6-3dcde31c8c00