Factory methods for heap-allocated SkPathEffect and SkXfermode objects.

include/effects/SkDiscretePathEffect.h

Index: include/effects/SkDiscretePathEffect.h
diff --git a/include/effects/SkDiscretePathEffect.h b/include/effects/SkDiscretePathEffect.h
index 60eb85274c1736967d848d9b2fa05f1c04e48760..a4ccc9b1c2931a69b1b37b5ecfeed617dfd16df8 100644
--- a/include/effects/SkDiscretePathEffect.h
+++ b/include/effects/SkDiscretePathEffect.h
@@ -20,7 +20,9 @@ public:
         away from the original path by a maximum of deviation.
         Note: works on filled or framed paths
     */
-    SkDiscretePathEffect(SkScalar segLength, SkScalar deviation);
+    static SkDiscretePathEffect* Create(SkScalar segLength, SkScalar deviation) {
+        return SkNEW_ARGS(SkDiscretePathEffect, (segLength, deviation));
+    }
 
     virtual bool filterPath(SkPath* dst, const SkPath& src,
                             SkStrokeRec*, const SkRect*) const SK_OVERRIDE;
@@ -28,6 +30,7 @@ public:
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDiscretePathEffect)
 
 protected:
+    SkDiscretePathEffect(SkScalar segLength, SkScalar deviation);
     SkDiscretePathEffect(SkReadBuffer&);
     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;