Optimize CSS box-shadow performance

bench/BlurRectBench.cpp

Index: bench/BlurRectBench.cpp
diff --git a/bench/BlurRectBench.cpp b/bench/BlurRectBench.cpp
index cdcdfe57f3442d0f6abab449e008e8a2e808c9ce..1b97901c196d2f6cb03eea3e6da7f316704888d0 100644
--- a/bench/BlurRectBench.cpp
+++ b/bench/BlurRectBench.cpp
@@ -91,7 +91,7 @@ protected:
     virtual void makeBlurryRect(const SkRect& r) SK_OVERRIDE {
         SkMask mask;
         SkBlurMask::BlurRect(SkBlurMask::ConvertRadiusToSigma(this->radius()),
-                             &mask, r, kNormal_SkBlurStyle);
+                             &mask, NULL,  r, kNormal_SkBlurStyle);
         SkMask::FreeImage(mask.fImage);
     }
 private:
@@ -145,7 +145,7 @@ protected:
     virtual void makeBlurryRect(const SkRect&) SK_OVERRIDE {
         SkMask mask;
         mask.fImage = NULL;
-        SkBlurMask::BoxBlur(&mask, fSrcMask, SkBlurMask::ConvertRadiusToSigma(this->radius()),
+        SkBlurMask::BoxBlur(&mask, NULL, fSrcMask, SkBlurMask::ConvertRadiusToSigma(this->radius()),
                             kNormal_SkBlurStyle, kHigh_SkBlurQuality);
         SkMask::FreeImage(mask.fImage);
     }