SkRectShaderImageFilter: add a new factory method which takes a CropRect.

src/effects/SkRectShaderImageFilter.cpp

Index: src/effects/SkRectShaderImageFilter.cpp
diff --git a/src/effects/SkRectShaderImageFilter.cpp b/src/effects/SkRectShaderImageFilter.cpp
index 37d6af28adccb2201fb719aa56d5a4f7c47f4fd3..a2409076c4083dda04774c6ba3f7c79afc3c3a35 100644
--- a/src/effects/SkRectShaderImageFilter.cpp
+++ b/src/effects/SkRectShaderImageFilter.cpp
@@ -31,6 +31,11 @@ SkRectShaderImageFilter* SkRectShaderImageFilter::Create(SkShader* s, const SkRe
     return SkNEW_ARGS(SkRectShaderImageFilter, (s, &cropRect));
 }
 
+SkRectShaderImageFilter* SkRectShaderImageFilter::Create(SkShader* s, const CropRect* cropRect) {
+    SkASSERT(s);
+    return SkNEW_ARGS(SkRectShaderImageFilter, (s, cropRect));
+}
+
 SkRectShaderImageFilter::SkRectShaderImageFilter(SkShader* s, const CropRect* cropRect)
   : INHERITED(NULL, cropRect)
   , fShader(s) {