Reviewed by Darin.

    Reviewed by Darin.

        - shrink PropertyMap by 8 bytes and therefore shrink CELL_SIZE to 40 (for 32-bit;
        similar shrinkage for 64-bit)
        http://bugs.webkit.org/show_bug.cgi?id=13384

        Inspired by similar changes by Christopher E. Hyde <C.Hyde@parableuk.force9.co.uk>
        done in the kjs-tweaks branch of KDE's kjs. However, this version is somewhat
        cleaner style-wise and avoids some of the negative speed impact (at least on gcc/x86)
        of his version.

        This is nearly a wash performance-wise, maybe a slight slowdown, but worth doing
        to eventually reach cell size 32.

        * kjs/collector.cpp:
        (KJS::):
        * kjs/property_map.cpp:
        (KJS::PropertyMap::~PropertyMap):
        (KJS::PropertyMap::clear):
        (KJS::PropertyMap::get):
        (KJS::PropertyMap::getLocation):
        (KJS::PropertyMap::put):
        (KJS::PropertyMap::insert):
        (KJS::PropertyMap::expand):
        (KJS::PropertyMap::rehash):
        (KJS::PropertyMap::remove):
        (KJS::PropertyMap::mark):
        (KJS::PropertyMap::containsGettersOrSetters):
        (KJS::PropertyMap::getEnumerablePropertyNames):
        (KJS::PropertyMap::getSparseArrayPropertyNames):
        (KJS::PropertyMap::save):
        (KJS::PropertyMap::checkConsistency):
        * kjs/property_map.h:
        (KJS::PropertyMap::hasGetterSetterProperties):
        (KJS::PropertyMap::setHasGetterSetterProperties):
        (KJS::PropertyMap::):
        (KJS::PropertyMap::PropertyMap):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@21018 268f45cc-cd09-0410-ab3c-d52691b4dbfc