Reviewed by Mark Rowe.

        Code clean-up and build fix for filters enabled builds. Moved SVGNames.h
        into #if ENABLE(SVG) for Document.cpp and added SVGNames.h to the other
        files. They are needed there after r47688.

        * dom/Document.cpp:
        * svg/SVGComponentTransferFunctionElement.h:
        * svg/SVGFELightElement.h:
        * svg/SVGFEMergeNodeElement.h:
        * svg/SVGFilterPrimitiveStandardAttributes.h:


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@47698 268f45cc-cd09-0410-ab3c-d52691b4dbfc