Factory methods for heap-allocated SkImageFilter objects.

include/effects/SkXfermodeImageFilter.h

Index: include/effects/SkXfermodeImageFilter.h
diff --git a/include/effects/SkXfermodeImageFilter.h b/include/effects/SkXfermodeImageFilter.h
index 602dc4840493307ef3081e70f5516f4e93c2ee60..b3872a058ce0cd3a201953d92892dd252c2764f8 100644
--- a/include/effects/SkXfermodeImageFilter.h
+++ b/include/effects/SkXfermodeImageFilter.h
@@ -21,11 +21,14 @@ class SK_API SkXfermodeImageFilter : public SkImageFilter {
       */
 
 public:
-    SkXfermodeImageFilter(SkXfermode* mode, SkImageFilter* background,
-                          SkImageFilter* foreground = NULL, const CropRect* cropRect = NULL);
-
     virtual ~SkXfermodeImageFilter();
 
+    static SkXfermodeImageFilter* Create(SkXfermode* mode, SkImageFilter* background,
+                                         SkImageFilter* foreground = NULL,
+                                         const CropRect* cropRect = NULL) {
+        return SkNEW_ARGS(SkXfermodeImageFilter, (mode, background, foreground, cropRect));
+    }
+
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkXfermodeImageFilter)
 
     virtual bool onFilterImage(Proxy* proxy,
@@ -43,6 +46,12 @@ protected:
     explicit SkXfermodeImageFilter(SkReadBuffer& buffer);
     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
 
+#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
+public:
+#endif
+    SkXfermodeImageFilter(SkXfermode* mode, SkImageFilter* background,
+                          SkImageFilter* foreground = NULL, const CropRect* cropRect = NULL);
+
 private:
     SkXfermode* fMode;
     typedef SkImageFilter INHERITED;