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The 'in' keyword has been removed from Web IDL for some years, but is still present in the Filter effects spec in a few places: http://www.w3.org/TR/filter-effects/#InterfaceSVGFEDropShadowElement http://www.w3.org/TR/filter-effects/#InterfaceSVGFEGaussianBlurElement http://www.w3.org/TR/filter-effects/#SVGFEDropShadowElement__setStdDeviation http://www.w3.org/TR/filter-effects/#SVGFEGaussianBlurElement__setStdDeviation ...these read: [[ void setStdDeviation(in float stdDeviationX, in float stdDeviationY); void setStdDeviation(in float stdDeviationX, in float stdDeviationY) ]] ...but should read: [[ void setStdDeviation(float stdDeviationX, float stdDeviationY); void setStdDeviation(float stdDeviationX, float stdDeviationY) ]]
Thank you very much for reporting. It is fixed now.