Factory methods for heap-allocated SkImageFilter objects.

include/effects/SkBlurImageFilter.h

Index: include/effects/SkBlurImageFilter.h
diff --git a/include/effects/SkBlurImageFilter.h b/include/effects/SkBlurImageFilter.h
index 60dab729b40724644ada4b693f0451d77987f5c5..44bf3935ccf6d25a37ffb21dbb43788cce15f91b 100644
--- a/include/effects/SkBlurImageFilter.h
+++ b/include/effects/SkBlurImageFilter.h
@@ -13,10 +13,13 @@
 
 class SK_API SkBlurImageFilter : public SkImageFilter {
 public:
-    SkBlurImageFilter(SkScalar sigmaX,
-                      SkScalar sigmaY,
-                      SkImageFilter* input = NULL,
-                      const CropRect* cropRect = NULL);
+    static SkBlurImageFilter* Create(SkScalar sigmaX,
+                                     SkScalar sigmaY,
+                                     SkImageFilter* input = NULL,
+                                     const CropRect* cropRect = NULL) {
+        return SkNEW_ARGS(SkBlurImageFilter, (sigmaX, sigmaY, input, cropRect));
+    }
+
     virtual void computeFastBounds(const SkRect&, SkRect*) const SK_OVERRIDE;
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBlurImageFilter)
@@ -34,6 +37,14 @@ protected:
     virtual bool filterImageGPU(Proxy* proxy, const SkBitmap& src, const SkMatrix& ctm,
                                 SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
 
+#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
+public:
+#endif
+    SkBlurImageFilter(SkScalar sigmaX,
+                      SkScalar sigmaY,
+                      SkImageFilter* input = NULL,
+                      const CropRect* cropRect = NULL);
+
 private:
     SkSize   fSigma;
     typedef SkImageFilter INHERITED;