Make sure that the name accessor on functions return the expected

Make sure that the name accessor on functions return the expected
names.

- Set the correct name of library functions.
- Set the name of C++ callback functions.
- Clean up a couple of out-dated comments related to literal creation.

Review URL: http://codereview.chromium.org/6223

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@414 ce2b1a6d-e550-0410-aec6-3dcde31c8c00