Reviewed by Maciej.

    Reviewed by Maciej.

        - http://bugzilla.opendarwin.org/show_bug.cgi?id=8147
          convert derived sources script to a Makefile

        * DerivedSources.make: Added.
        * css/CSSPrimitiveValue.idl: Added.
        * css/Counter.idl: Added.
        * css/StyleSheet.idl: Added.

        * WebCore.xcodeproj/project.pbxproj: Added new generated files, IDLs, and the makefile.
        * bindings/scripts/CodeGeneratorJS.pm:

        * generate-derived-sources: Added license header. Removed most of the script, except for
        a single invocation of make.

        * khtml/ecma/kjs_css.h: Removed DOMStyleSheet, DOMCSSPrimitiveValue,
        CSSPrimitiveValueConstructor, and DOMCounter.
        * khtml/ecma/kjs_css.cpp:
        (KJS::DOMCSSStyleSheet::DOMCSSStyleSheet): Changed to use JSStyleSheet as the base class.
        (KJS::DOMCSSStyleSheet::getOwnPropertySlot): Ditto.
        (KJS::DOMCSSValueProtoFunc::callAsFunction): Added.
        (KJS::toJS): Changed to use JSCSSPrimitiveValue.
        (KJS::DOMRGBColor::getValueProperty): Changed to call toJS instead of making a
        DOMCSSPrimitiveValue directly.

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@13665 268f45cc-cd09-0410-ab3c-d52691b4dbfc