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

include/core/SkFlattenable.h

 /*
  * Copyright 2006 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 SkFlattenable_DEFINED
 #define SkFlattenable_DEFINED
 
@@ skipping 22 matching lines @@
  */
 
 #define SK_DECLARE_FLATTENABLE_REGISTRAR_GROUP() static void InitializeFlattenables();
 
 #define SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_START(flattenable) \
     void flattenable::InitializeFlattenables() {
 
 #define SK_DEFINE_FLATTENABLE_REGISTRAR_GROUP_END \
     }
 
-#define SK_DECLARE_UNFLATTENABLE_OBJECT() \
-    virtual Factory getFactory() const SK_OVERRIDE { return NULL; }
-
 #define SK_DEFINE_FLATTENABLE_REGISTRAR_ENTRY(flattenable) \
     SkFlattenable::Registrar(#flattenable, flattenable::CreateProc, \
                              flattenable::GetFlattenableType());
 
 #define SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(flattenable)    \
     private:                                                                \
     static SkFlattenable* CreateProc(SkReadBuffer&);                        \
     friend class SkPrivateEffectInitializer;                                \
     public:                                                                 \
     virtual Factory getFactory() const SK_OVERRIDE { return CreateProc; }
 
-// If your subclass will *never* need to be unflattened, declare this.
-#define SK_DECLARE_NOT_FLATTENABLE_PROCS(flattenable)   \
-    virtual Factory getFactory() const SK_OVERRIDE { return ReturnNullCreateProc; }
-
 /** For SkFlattenable derived objects with a valid type
     This macro should only be used in base class objects in core
   */
 #define SK_DEFINE_FLATTENABLE_TYPE(flattenable) \
     static Type GetFlattenableType() { \
         return k##flattenable##_Type; \
     }
 
 /** \class SkFlattenable
 
@@ skipping 44 matching lines @@
             SkFlattenable::Register(name, factory, type);
         }
     };
 
     /**
      *  Override this if your subclass needs to record data that it will need to recreate itself
      *  from its CreateProc (returned by getFactory()).
      */
     virtual void flatten(SkWriteBuffer&) const {}
 
-protected:
-    static SkFlattenable* ReturnNullCreateProc(SkReadBuffer&) {
-        return NULL;
-    }
-
 private:
     static void InitializeFlattenablesIfNeeded();
 
     friend class SkGraphics;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif