Simplify flattening to just write enough to call the factory

include/core/SkDrawLooper.h

 
 /*
  * Copyright 2011 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #ifndef SkDrawLooper_DEFINED
@@ skipping 96 matching lines @@
      *
      *  If any of the above are not met, return false and ignore the BlurShadowRec parameter.
      */
     virtual bool asABlurShadow(BlurShadowRec*) const;
 
     SK_TO_STRING_PUREVIRT()
     SK_DEFINE_FLATTENABLE_TYPE(SkDrawLooper)
 
 protected:
     SkDrawLooper() {}
+#ifdef SK_SUPPORT_LEGACY_DEEPFLATTENING
     SkDrawLooper(SkReadBuffer& buffer) : INHERITED(buffer) {}
+#endif
 
 private:
     typedef SkFlattenable INHERITED;
 };
 
 #endif