Factory methods for heap-allocated SkPathEffect and SkXfermode objects.

include/effects/SkCornerPathEffect.h

Index: include/effects/SkCornerPathEffect.h
diff --git a/include/effects/SkCornerPathEffect.h b/include/effects/SkCornerPathEffect.h
index dcb7c9f736c34c571cdf30e0e6b56b536ee22125..c77505be3911512f9478e52e54ea83a70f9f0762 100644
--- a/include/effects/SkCornerPathEffect.h
+++ b/include/effects/SkCornerPathEffect.h
@@ -20,7 +20,9 @@ public:
     /** radius must be > 0 to have an effect. It specifies the distance from each corner
         that should be "rounded".
     */
-    SkCornerPathEffect(SkScalar radius);
+    static SkCornerPathEffect* Create(SkScalar radius) {
+        return SkNEW_ARGS(SkCornerPathEffect, (radius));
+    }
     virtual ~SkCornerPathEffect();
 
     virtual bool filterPath(SkPath* dst, const SkPath& src,
@@ -32,6 +34,11 @@ protected:
     SkCornerPathEffect(SkReadBuffer&);
     virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
 
+#ifdef SK_SUPPORT_LEGACY_PUBLICEFFECTCONSTRUCTORS
+public:
+#endif
+    SkCornerPathEffect(SkScalar radius);
+
 private:
     SkScalar    fRadius;