Relax restrictions on CONSTANT_FUNCTION descriptors in TransformPropertiesToFastFor.

Relax restrictions on CONSTANT_FUNCTION descriptors in TransformPropertiesToFastFor.

Since r10174 they are not required to be in new space.

R=danno@chromium.org
BUG=

Committed: https://code.google.com/p/v8/source/detail?r=13077

[Vyacheslav Egorov (Google), 2012-11-27 15:07:27]

Hi!

Please take a look at this change. 

Current behavior of TransformPropertiesToFastFor leads to unpredictable
performance for dynamically constructed prototypes. Depending on GC timing
methods on the prototype might end up either as CONSTANT_FUNCTION properties or
as FIELD ones.

Calling methods through a FIELD is much slower then calling a method through a
CONSTANT_FUNCTION. Currently hydrogen emits a generic HCallNamed for such case
instead of splitting call into fast field load and invocation and neither
hydrogen does try to inline at such call sites.

[danno, 2012-11-28 13:33:32]

lgtm