Update handling of negative radius for feMorphology

Source/platform/graphics/filters/FEMorphology.cpp

Index: Source/platform/graphics/filters/FEMorphology.cpp
diff --git a/Source/platform/graphics/filters/FEMorphology.cpp b/Source/platform/graphics/filters/FEMorphology.cpp
index f5d77963f6243cf140c31c194d06d24628c8f699..bfd2ebcbd11039b4b8abfd40bf56f3243fd7954a 100644
--- a/Source/platform/graphics/filters/FEMorphology.cpp
+++ b/Source/platform/graphics/filters/FEMorphology.cpp
@@ -35,8 +35,8 @@ namespace blink {
 FEMorphology::FEMorphology(Filter* filter, MorphologyOperatorType type, float radiusX, float radiusY)
     : FilterEffect(filter)
     , m_type(type)
-    , m_radiusX(radiusX)
-    , m_radiusY(radiusY)
+    , m_radiusX(std::max(0.0f, radiusX))
+    , m_radiusY(std::max(0.0f, radiusY))
 {
 }
 
@@ -65,6 +65,7 @@ float FEMorphology::radiusX() const
 
 bool FEMorphology::setRadiusX(float radiusX)
 {
+    radiusX = std::max(0.0f, radiusX);
     if (m_radiusX == radiusX)
         return false;
     m_radiusX = radiusX;
@@ -76,22 +77,23 @@ float FEMorphology::radiusY() const
     return m_radiusY;
 }
 
-FloatRect FEMorphology::mapRect(const FloatRect& rect, bool)
-{
-    FloatRect result = rect;
-    result.inflateX(filter()->applyHorizontalScale(m_radiusX));
-    result.inflateY(filter()->applyVerticalScale(m_radiusY));
-    return result;
-}
-
 bool FEMorphology::setRadiusY(float radiusY)
 {
+    radiusY = std::max(0.0f, radiusY);
     if (m_radiusY == radiusY)
         return false;
     m_radiusY = radiusY;
     return true;
 }
 
+FloatRect FEMorphology::mapRect(const FloatRect& rect, bool)
+{
+    FloatRect result = rect;
+    result.inflateX(filter()->applyHorizontalScale(m_radiusX));
+    result.inflateY(filter()->applyVerticalScale(m_radiusY));
+    return result;
+}
+
 PassRefPtr<SkImageFilter> FEMorphology::createImageFilter(SkiaImageFilterBuilder* builder)
 {
     RefPtr<SkImageFilter> input(builder->build(inputEffect(0), operatingColorSpace()));