Reviewed by Anders.

    Reviewed by Anders.

        - .5% speed improvement by avoiding excess CFURLRef allocation

        * loader/CachedResource.cpp:
        (WebCore::CachedResource::getCFURL): New method. For Mac only (for now), cache the CFURL
        here for later reuse.
        * loader/CachedResource.h:
        * loader/mac/LoaderFunctionsMac.mm:
        (WebCore::CheckCacheObjectStatus): Use the cached CFURL, don't make a whole new one.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@17300 268f45cc-cd09-0410-ab3c-d52691b4dbfc