Add staging for removal of SkRRectsGaussianEdgeShader::Make (for Android)

src/effects/SkRRectsGaussianEdgeShader.cpp

Index: src/effects/SkRRectsGaussianEdgeShader.cpp
diff --git a/src/effects/SkRRectsGaussianEdgeShader.cpp b/src/effects/SkRRectsGaussianEdgeShader.cpp
index 2c41c26c101b4f8053b27f586b042e4fb4b2d9da..365a5afcc60fc7f955c4c01838074ef5e2e74e2b 100644
--- a/src/effects/SkRRectsGaussianEdgeShader.cpp
+++ b/src/effects/SkRRectsGaussianEdgeShader.cpp
@@ -409,7 +409,7 @@ SkShader::Context* SkRRectsGaussianEdgeShaderImpl::onCreateContext(const Context
 
 sk_sp<SkShader> SkRRectsGaussianEdgeShader::Make(const SkRRect& first,
                                                  const SkRRect& second,
-                                                 SkScalar radius) {
+                                                 SkScalar radius, SkScalar unused) {
     if ((!first.isRect()  && !first.isCircle()  && !first.isSimpleCircular()) || 
         (!second.isRect() && !second.isCircle() && !second.isSimpleCircular())) {
         // we only deal with the shapes where the x & y radii are equal