Reviewed/landed by Adam.

    Reviewed/landed by Adam.

        Fixes parts of: http://bugzilla.opendarwin.org/show_bug.cgi?id=10467
        WebKit should have Qt platform support

        * CMakeLists.txt:
            Remove KCanvasMatrix.cpp because it no longer exists
            Remove platform/qt/test
        * platform/FloatSize.h:
        * platform/image-decoders/bmp/BMPImageDecoder.cpp:
        * platform/image-decoders/gif/GIFImageDecoder.cpp:
        * platform/image-decoders/gif/GIFImageReader.cpp:
        * platform/image-decoders/ico/ICOImageDecoder.cpp:
        * platform/image-decoders/jpeg/JPEGImageDecoder.cpp:
        * platform/image-decoders/png/PNGImageDecoder.cpp:
        * platform/image-decoders/xbm/XBMImageDecoder.cpp:
            Added PLATFORM(QT) hooks in the image-decoders/, as they also need
            to work for Qt, not only for Cairo.
        * platform/qt/qt-encodings.txt: Added (required for build).

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@16016 268f45cc-cd09-0410-ab3c-d52691b4dbfc