Optimize CSS box-shadow performance

gm/blurrect.cpp

Index: gm/blurrect.cpp
diff --git a/gm/blurrect.cpp b/gm/blurrect.cpp
index 768e7982104bfa250bfd4fe82976830da49ea295..5680369246fa743a82a0e5a20665808dbd5ed7ad 100644
--- a/gm/blurrect.cpp
+++ b/gm/blurrect.cpp
@@ -189,7 +189,7 @@ protected:
                     SkBlurStyle style = styles[k];
 
                     SkMask mask;
-                    SkBlurMask::BlurRect(SkBlurMask::ConvertRadiusToSigma(radius), &mask, r, style);
+                    SkBlurMask::BlurRect(SkBlurMask::ConvertRadiusToSigma(radius), &mask, NULL, r, style);
 
                     SkAutoMaskFreeImage amfi(mask.fImage);
 
@@ -305,7 +305,7 @@ public:
 protected:
     virtual bool makeMask(SkMask *m, const SkRect& r) SK_OVERRIDE {
         return SkBlurMask::BlurRect(SkBlurMask::ConvertRadiusToSigma(this->radius()),
-                                    m, r, this->style());
+                                    m, NULL, r, this->style());
     }
 private:
     typedef BlurRectCompareGM INHERITED;
@@ -330,7 +330,7 @@ protected:
 
         memset(src.fImage, 0xff, src.computeTotalImageSize());
 
-        return SkBlurMask::BoxBlur(m, src,
+        return SkBlurMask::BoxBlur(m, NULL, src,
                                    SkBlurMask::ConvertRadiusToSigma(this->radius()),
                                    this->style(), this->getQuality());
     }