Reviewed by Dimitri Glazkov.

        Implement Backgroun and Mask properties in CSSStyleApplyProperty
        https://bugs.webkit.org/show_bug.cgi?id=57922

        No tests added as no behavioral changes.

        * css/CSSStyleApplyProperty.cpp:
        Added ApplyPropertyFillLayer test to handle Background and Mask CSS Properties.
        (WebCore::CSSStyleApplyProperty::CSSStyleApplyProperty):
        Added constructor calls to set up:
          CSSPropertyBackgroundAttachment
          CSSPropertyBackgroundClip
          CSSPropertyWebkitBackgroundClip
          CSSPropertyWebkitBackgroundComposite
          CSSPropertyBackgroundOrigin
          CSSPropertyWebkitBackgroundOrigin
          CSSPropertyBackgroundSize
          CSSPropertyWebkitBackgroundSize
          CSSPropertyWebkitMaskAttachment
          CSSPropertyWebkitMaskClip
          CSSPropertyWebkitMaskComposite
          CSSPropertyWebkitMaskOrigin
          CSSPropertyWebkitMaskSize
        * css/CSSStyleApplyProperty.h:
        (WebCore::CSSStyleApplyProperty::setPropertyValue):
        Add function to specify an equivalent property value in the lookup table.
        * css/CSSStyleSelector.cpp:
        (WebCore::CSSStyleSelector::applyProperty):
        Remove sections now implemented by CSSStyleApplyProperty.
        * css/CSSStyleSelector.h:
        Make CSSStyleApplyProperty a friend class so that the mapFill* functions are accessible.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@83241 268f45cc-cd09-0410-ab3c-d52691b4dbfc