Introduce a stack-allocated structure to encapsulate compile-time information.

Introduce a stack-allocated structure to encapsulate compile-time information.

Use it to hold the possible shared function info, the possible
receiver, and the compilation loop nesting depth.  Remove loop nesting
from FunctionLiteral AST nodes.

Review URL: http://codereview.chromium.org/552232

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3744 ce2b1a6d-e550-0410-aec6-3dcde31c8c00