Simplify flattening to just write enough to call the factory

include/effects/SkStippleMaskFilter.h

Index: include/effects/SkStippleMaskFilter.h
diff --git a/include/effects/SkStippleMaskFilter.h b/include/effects/SkStippleMaskFilter.h
index 30263a3689488e176c80bc6e3f4f3201d05bae14..b016a164504ee9b22226dbfcc3614aabf898de3f 100644
--- a/include/effects/SkStippleMaskFilter.h
+++ b/include/effects/SkStippleMaskFilter.h
@@ -32,11 +32,10 @@ public:
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkStippleMaskFilter);
 
 protected:
-    SkStippleMaskFilter() : INHERITED() {
-    }
-    explicit SkStippleMaskFilter(SkReadBuffer& buffer)
-        : SkMaskFilter(buffer) {
-    }
+    SkStippleMaskFilter() {}
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
+    explicit SkStippleMaskFilter(SkReadBuffer& buffer) : SkMaskFilter(buffer) {}
+#endif
 
 private:
     typedef SkMaskFilter INHERITED;