Reviewed by Maciej. Landed by Adam.

    Reviewed by Maciej. Landed by Adam.

        Fixes: http://bugs.webkit.org/show_bug.cgi?id=11463
        Move KCanvasTreeDebug into rendering, named as SVGRenderTreeAsText.*,
        as dicussed with Dave. Also kill the outdated DESIGN document.

        * CMakeLists.txt:
        * WebCore.xcodeproj/project.pbxproj:
        * kcanvas/DESIGN: Removed.
        * kcanvas/KCanvasFilters.cpp:
        * kcanvas/KCanvasTreeDebug.cpp: Moved to rendering/SVGRenderTreeAsText
        * kcanvas/KCanvasTreeDebug.h: Ditto.
        * kcanvas/device/KRenderingPaintServerGradient.cpp:
        * kcanvas/device/KRenderingPaintServerPattern.cpp:
        * kcanvas/device/KRenderingPaintServerSolid.cpp:
        * platform/graphics/svg/SVGResourceClipper.cpp:
        * rendering/RenderTreeAsText.cpp:
        * rendering/SVGRenderTreeAsText.cpp: Added.
        * rendering/SVGRenderTreeAsText.h: Added.
        (WebCore::operator<<):

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@17486 268f45cc-cd09-0410-ab3c-d52691b4dbfc