Made shadows blurry (thru implementing variance mapping)

src/utils/SkShadowPaintFilterCanvas.h

Index: src/utils/SkShadowPaintFilterCanvas.h
diff --git a/src/utils/SkShadowPaintFilterCanvas.h b/src/utils/SkShadowPaintFilterCanvas.h
index ae449d64f9ef873c41b7bbeb89a72d2a1577106f..79f8a0c30749a950dc94432cad9736ba8cba5f14 100644
--- a/src/utils/SkShadowPaintFilterCanvas.h
+++ b/src/utils/SkShadowPaintFilterCanvas.h
@@ -35,6 +35,7 @@ public:
     static SkISize ComputeDepthMapSize(const SkLights::Light& light, int maxDepth,
                                        int width, int height);
 
+    void setShadowType(const SkShadowParams& sParams);
 protected:
     void onDrawPicture(const SkPicture *picture, const SkMatrix *matrix,
                        const SkPaint *paint) override;
@@ -105,6 +106,7 @@ protected:
     void onDrawTextBlob(const SkTextBlob *blob, SkScalar x,
                         SkScalar y, const SkPaint &paint) override;
 private:
+    SkShadowParams fShadowParams;
     typedef SkPaintFilterCanvas INHERITED;
 };