Factory methods for heap-allocated SkImageFilter objects.

include/effects/SkPictureImageFilter.h

Index: include/effects/SkPictureImageFilter.h
diff --git a/include/effects/SkPictureImageFilter.h b/include/effects/SkPictureImageFilter.h
index a10d23eebb2454264552d4c27602563aab5072f1..1eda5dcceb22a35ad34cd5ef629845b072dcb9e9 100644
--- a/include/effects/SkPictureImageFilter.h
+++ b/include/effects/SkPictureImageFilter.h
@@ -16,13 +16,17 @@ public:
     /**
      *  Refs the passed-in picture.
      */
-    explicit SkPictureImageFilter(SkPicture* picture);
+    static SkPictureImageFilter* Create(SkPicture* picture) {
+        return SkNEW_ARGS(SkPictureImageFilter, (picture));
+    }
 
     /**
-     *  Refs the passed-in picture. rect can be used to crop or expand the destination rect when
+     *  Refs the passed-in picture. cropRect can be used to crop or expand the destination rect when
      *  the picture is drawn. (No scaling is implied by the dest rect; only the CTM is applied.)
      */
-    SkPictureImageFilter(SkPicture* picture, const SkRect& rect);
+    static SkPictureImageFilter* Create(SkPicture* picture, const SkRect& cropRect) {
+        return SkNEW_ARGS(SkPictureImageFilter, (picture, cropRect));
+    }
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkPictureImageFilter)
 
@@ -39,9 +43,15 @@ protected:
     virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
                                SkBitmap* result, SkIPoint* offset) const SK_OVERRIDE;
 
+#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
+public:
+#endif
+    explicit SkPictureImageFilter(SkPicture* picture);
+    SkPictureImageFilter(SkPicture* picture, const SkRect& cropRect);
+
 private:
     SkPicture* fPicture;
-    SkRect     fRect;
+    SkRect     fCropRect;
     typedef SkImageFilter INHERITED;
 };