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.

Committed: http://code.google.com/p/v8/source/detail?r=3744

[fschneider, 2010-01-29 11:44:50]

LGTM.