plumb API for analytic rrect blur

src/effects/SkBlurMask.cpp

Index: src/effects/SkBlurMask.cpp
diff --git a/src/effects/SkBlurMask.cpp b/src/effects/SkBlurMask.cpp
index 50c16f415152713478d309b1de7e17e5128d52e9..0765a3eca2c67b060a9fe2b8933b8b7a24ffc3e9 100644
--- a/src/effects/SkBlurMask.cpp
+++ b/src/effects/SkBlurMask.cpp
@@ -749,6 +749,16 @@ bool SkBlurMask::BlurRect(SkMask *dst, const SkRect &src,
                                 style, margin, createMode);
 }
 
+bool SkBlurMask::BlurRRect(SkMask *dst, const SkRRect &src,
+                          SkScalar radius, Style style,
+                          SkIPoint *margin, SkMask::CreateMode createMode) {
+
+    return SkBlurMask::BlurRRect(SkBlurMask::ConvertRadiusToSigma(radius),
+                                dst, src,
+                                style, margin, createMode);
+}
+
+
 bool SkBlurMask::BlurRect(SkScalar sigma, SkMask *dst,
                           const SkRect &src, Style style,
                           SkIPoint *margin, SkMask::CreateMode createMode) {
@@ -850,6 +860,15 @@ bool SkBlurMask::BlurRect(SkScalar sigma, SkMask *dst,
     return true;
 }
 
+bool SkBlurMask::BlurRRect(SkScalar sigma, SkMask *dst,
+                           const SkRRect &src, Style style,
+                           SkIPoint *margin, SkMask::CreateMode createMode) {
+    // Temporary for now -- always fail, should cause caller to fall back
+    // to old path.  Plumbing just to land API and parallelize effort.
+
+    return false;
+}
+
 bool SkBlurMask::BlurGroundTruth(SkMask* dst, const SkMask& src, SkScalar radius,
                                  Style style, SkIPoint* margin) {
     return BlurGroundTruth(ConvertRadiusToSigma(radius), dst, src, style, margin);