Record function call targets, use them for inlining.

Record function call targets, use them for inlining.

Introduce a version of the CallFunctionStub that records monomorphic
call targets in a one-element cache in the instruction stream.  Use
the cache for inlining attempts in the optimizing backend.

R=fschneider@chromium.org
BUG=
TEST=

Committed: http://code.google.com/p/v8/source/detail?r=9449

[fschneider, 2011-09-27 08:53:42]

LGTM.