Factory methods for heap-allocated SkImageFilter objects.

include/effects/SkOffsetImageFilter.h

Index: include/effects/SkOffsetImageFilter.h
diff --git a/include/effects/SkOffsetImageFilter.h b/include/effects/SkOffsetImageFilter.h
index 31eead3ded37be850ddd6300ceb76a82e800685a..93fc273cd6dfa7531feabf0af59ca194e17cdcd8 100644
--- a/include/effects/SkOffsetImageFilter.h
+++ b/include/effects/SkOffsetImageFilter.h
@@ -15,8 +15,10 @@ class SK_API SkOffsetImageFilter : public SkImageFilter {
     typedef SkImageFilter INHERITED;
 
 public:
-    SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input = NULL,
-                        const CropRect* cropRect = NULL);
+    static SkOffsetImageFilter* Create(SkScalar dx, SkScalar dy, SkImageFilter* input = NULL,
+                                       const CropRect* cropRect = NULL) {
+        return SkNEW_ARGS(SkOffsetImageFilter, (dx, dy, input, cropRect));
+    }
     virtual void computeFastBounds(const SkRect& src, SkRect* dst) const SK_OVERRIDE;
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkOffsetImageFilter)
 
@@ -28,6 +30,12 @@ protected:
                                SkBitmap* result, SkIPoint* loc) const SK_OVERRIDE;
     virtual bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) const SK_OVERRIDE;
 
+#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
+public:
+#endif
+    SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input = NULL,
+                        const CropRect* cropRect = NULL);
+
 private:
     SkVector fOffset;
 };