Factory methods for heap-allocated SkImageFilter objects.

include/effects/SkMagnifierImageFilter.h

Index: include/effects/SkMagnifierImageFilter.h
diff --git a/include/effects/SkMagnifierImageFilter.h b/include/effects/SkMagnifierImageFilter.h
index 44f0d0d6898e005ce1776c114d579b043f9e2bd0..cfe1f09b411aba757a7445850abb96a87f346347 100644
--- a/include/effects/SkMagnifierImageFilter.h
+++ b/include/effects/SkMagnifierImageFilter.h
@@ -14,7 +14,9 @@
 
 class SK_API SkMagnifierImageFilter : public SkImageFilter {
 public:
-    SkMagnifierImageFilter(SkRect srcRect, SkScalar inset);
+    static SkMagnifierImageFilter* Create(const SkRect& srcRect, SkScalar inset) {
+        return SkNEW_ARGS(SkMagnifierImageFilter, (srcRect, inset));
+    }
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkMagnifierImageFilter)
 
@@ -28,6 +30,11 @@ protected:
     virtual bool asNewEffect(GrEffectRef** effect, GrTexture* texture, const SkMatrix& matrix, const SkIRect& bounds) const SK_OVERRIDE;
 #endif
 
+#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
+public:
+#endif
+    SkMagnifierImageFilter(const SkRect& srcRect, SkScalar inset);
+
 private:
     SkRect fSrcRect;
     SkScalar fInset;