SkData need not be a Flattenable, since it does not need subclass/factories

include/core/SkData.h

Index: include/core/SkData.h
diff --git a/include/core/SkData.h b/include/core/SkData.h
index 6f883c884387480a305ede19bf1ff8556e5d1652..c244cb8a927163f8e17e891994d81d4bd033ed2b 100644
--- a/include/core/SkData.h
+++ b/include/core/SkData.h
@@ -11,7 +11,7 @@
 #ifndef SkData_DEFINED
 #define SkData_DEFINED
 
-#include "SkFlattenable.h"
+#include "SkRefCnt.h"
 
 struct SkFILE;
 
@@ -20,7 +20,7 @@ struct SkFILE;
  *  but the actual ptr that is returned (by data() or bytes()) is guaranteed
  *  to always be the same for the life of this instance.
  */
-class SK_API SkData : public SkFlattenable {
+class SK_API SkData : public SkRefCnt {
 public:
     SK_DECLARE_INST_COUNT(SkData)
 
@@ -126,12 +126,6 @@ public:
      */
     static SkData* NewEmpty();
 
-    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkData)
-
-protected:
-    SkData(SkFlattenableReadBuffer&);
-    virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
-
 private:
     ReleaseProc fReleaseProc;
     void*       fReleaseProcContext;
@@ -142,7 +136,7 @@ private:
     SkData(const void* ptr, size_t size, ReleaseProc, void* context);
     virtual ~SkData();
 
-    typedef SkFlattenable INHERITED;
+    typedef SkRefCnt INHERITED;
 };
 
 /** Typedef of SkAutoTUnref<SkData> for automatically unref-ing a SkData. */