Revert "remvoe duplicate impl for SkImageInfo flattening"

src/image/SkDataPixelRef.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkDataPixelRef_DEFINED
 #define SkDataPixelRef_DEFINED
 
 #include "SkPixelRef.h"
 
 class SkData;
 
 class SkDataPixelRef : public SkPixelRef {
 public:
-            SkDataPixelRef(const SkImageInfo&, SkData* data, size_t rowBytes);
+            SkDataPixelRef(SkData* data);
     virtual ~SkDataPixelRef();
 
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkDataPixelRef)
 
 protected:
-    virtual bool onNewLockPixels(LockRec*) SK_OVERRIDE;
+    virtual void* onLockPixels(SkColorTable**) SK_OVERRIDE;
     virtual void onUnlockPixels() SK_OVERRIDE;
     virtual size_t getAllocatedSizeInBytes() const SK_OVERRIDE;
 
     SkDataPixelRef(SkFlattenableReadBuffer& buffer);
     virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
 
 private:
-    SkData*     fData;
-    size_t      fRB;
+    SkData* fData;
 
     typedef SkPixelRef INHERITED;
 };
 
 #endif