Allow inlining of named function expressions containing ThisFunction reference.

Allow inlining of named function expressions containing ThisFunction reference.

Named function expression have an implicit local variable that
refers to the current function (ThisFunction). Before we only could inline
anonymous function expressions like:

A.prototype.foo = function() {}

as opposed to

A.prototype.foo = function foo() {}

This change enables inlining function of expressions like this.
Committed: http://code.google.com/p/v8/source/detail?r=9699

[Vyacheslav Egorov (Chromium), 2011-10-19 11:32:19]

lgtm