Remove the forward-bailout stack from the non-optimizing compiler.

Remove the forward-bailout stack from the non-optimizing compiler.

This was pretty heavyweight.  It was kept in just for a few corner cases
that assumed it was there.  We can work around them by making sure that the
expression in a reified test context is always really the expression that
was visited in that context; and by inspecting the context manually and
consing up a pair of extra AST IDs for the unusual case of unary not in a
value AST context.

R=fschneider@chromium.org
BUG=
TEST=

Committed: http://code.google.com/p/v8/source/detail?r=9863

[fschneider, 2011-11-02 16:53:02]

LGTM!