Reviewed by Eric Seidel.

        https://bugs.webkit.org/show_bug.cgi?id=25709 part eight
        Replace placeholder Cairo BMP, ICO, XBM decoders with real ones.  Remove
        all the decoders from skia/ since they are now just mirrors of the Cairo
        ones.

        * GNUmakefile.am:
        * WebCore.vcproj/WebCore.vcproj:
        * WebCoreSources.bkl:
        * platform/graphics/cairo/ImageSourceCairo.cpp:
        (WebCore::createDecoder): Pass IntSize() to ICOImageDecoder() so it will always decode the largest icon.  Enable XBM decoding on Windows.
        * platform/graphics/skia/ImageSourceSkia.cpp:
        * platform/graphics/wx/ImageSourceWx.cpp:
        (WebCore::createDecoder): Pass IntSize() to ICOImageDecoder() so it will always decode the largest icon.
        * platform/image-decoders/bmp/BMPImageDecoder.cpp: Replaced with WebCore/platform/image-decoders/skia/BMPImageDecoder.cpp.
        * platform/image-decoders/bmp/BMPImageDecoder.h: Replaced with WebCore/platform/image-decoders/skia/BMPImageDecoder.h.
        * platform/image-decoders/bmp/BMPImageReader.cpp: Copied from WebCore/platform/image-decoders/skia/BMPImageReader.cpp.
        * platform/image-decoders/bmp/BMPImageReader.h: Copied from WebCore/platform/image-decoders/skia/BMPImageReader.h.
        * platform/image-decoders/ico/ICOImageDecoder.cpp: Replaced with WebCore/platform/image-decoders/skia/ICOImageDecoder.cpp.
        * platform/image-decoders/ico/ICOImageDecoder.h: Replaced with WebCore/platform/image-decoders/skia/ICOImageDecoder.h.
        * platform/image-decoders/skia/BMPImageDecoder.cpp: Removed.
        * platform/image-decoders/skia/BMPImageDecoder.h: Removed.
        * platform/image-decoders/skia/BMPImageReader.cpp: Removed.
        * platform/image-decoders/skia/BMPImageReader.h: Removed.
        * platform/image-decoders/skia/GIFImageDecoder.cpp: Removed.
        * platform/image-decoders/skia/GIFImageDecoder.h: Removed.
        * platform/image-decoders/skia/GIFImageReader.cpp: Removed.
        * platform/image-decoders/skia/GIFImageReader.h: Removed.
        * platform/image-decoders/skia/ICOImageDecoder.cpp: Removed.
        * platform/image-decoders/skia/ICOImageDecoder.h: Removed.
        * platform/image-decoders/skia/JPEGImageDecoder.cpp: Removed.
        * platform/image-decoders/skia/JPEGImageDecoder.h: Removed.
        * platform/image-decoders/skia/PNGImageDecoder.cpp: Removed.
        * platform/image-decoders/skia/PNGImageDecoder.h: Removed.
        * platform/image-decoders/skia/XBMImageDecoder.cpp: Removed.
        * platform/image-decoders/skia/XBMImageDecoder.h: Removed.
        * platform/image-decoders/xbm/XBMImageDecoder.cpp: Replaced with WebCore/platform/image-decoders/skia/XBMImageDecoder.cpp.
        * platform/image-decoders/xbm/XBMImageDecoder.h: Replaced with WebCore/platform/image-decoders/skia/XBMImageDecoder.h.



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@44634 268f45cc-cd09-0410-ab3c-d52691b4dbfc