Remove macros that make it look like it's a good idea to not be able to flatten.

src/animator/SkDrawExtraPathEffect.cpp

Index: src/animator/SkDrawExtraPathEffect.cpp
diff --git a/src/animator/SkDrawExtraPathEffect.cpp b/src/animator/SkDrawExtraPathEffect.cpp
index cc097d0a9ecd3e094577fe942bdbee3aea6ba831..dc586055a72b7afaf2168b4e2885016c5ae61fc4 100644
--- a/src/animator/SkDrawExtraPathEffect.cpp
+++ b/src/animator/SkDrawExtraPathEffect.cpp
@@ -89,7 +89,8 @@ public:
         fDraw(draw), fMaker(maker) {
     }
 
-    SK_DECLARE_UNFLATTENABLE_OBJECT()
+    // For serialization.  This will never be called.
+    Factory getFactory() const SK_OVERRIDE { sk_throw(); return NULL; }
 
 protected:
     virtual SkScalar begin(SkScalar contourLength) const SK_OVERRIDE {
@@ -228,6 +229,9 @@ public:
         const SkMatrix& matrix) : Sk2DPathEffect(matrix), fDraw(draw), fMaker(maker) {
     }
 
+    // For serialization.  This will never be called.
+    Factory getFactory() const SK_OVERRIDE { sk_throw(); return NULL; }
+
 protected:
     virtual void begin(const SkIRect& uvBounds, SkPath*) const SK_OVERRIDE {
         const_cast<SkShape2DPathEffect*>(this)->setUVBounds(uvBounds);