Reviewed by James Robinson.

        REGRESSION(88260): 10-50% performance regression across many page cyclers
        https://bugs.webkit.org/show_bug.cgi?id=62349

        Made CHROMIUM platform specific values for cMaxInactiveFontData and
        cTargetInactiveFontData to mitigate the current performance issue on Chromium
        page cycler tests.  Made the chromium value for cMaxInactiveFontData 250 based
        on recommendation from James Robinson.  Changed cTargetInactiveFontData to 200
        so that 50 inactive fonts will be cleaned up at a time.

        Change made to address existing Chromium performance test regression.

        * platform/graphics/FontCache.cpp:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@88611 268f45cc-cd09-0410-ab3c-d52691b4dbfc