Move SkPaint mangement for 2D canvas into CanvasRenderingContext2DState

Source/platform/graphics/skia/SkiaUtils.h

Index: Source/platform/graphics/skia/SkiaUtils.h
diff --git a/Source/platform/graphics/skia/SkiaUtils.h b/Source/platform/graphics/skia/SkiaUtils.h
index 91a916dc997069c3950de45d6c7402901e0428bc..1aa4f1929a7cd7bdafbffb9b7a68d4756eb952ec 100644
--- a/Source/platform/graphics/skia/SkiaUtils.h
+++ b/Source/platform/graphics/skia/SkiaUtils.h
@@ -129,6 +129,13 @@ InterpolationQuality computeInterpolationQuality(
 
 bool shouldDrawAntiAliased(const GraphicsContext*, const SkRect& destRect);
 
+// This replicates the old skia behavior when it used to take radius for blur. Now it takes sigma.
+inline SkScalar skBlurRadiusToSigma(SkScalar radius)
+{
+    SkASSERT(radius > 0);
+    return 0.288675f * radius + 0.5f;
+}
+
 } // namespace blink
 
 #endif  // SkiaUtils_h