Refactor read and write buffers.

include/core/SkShader.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 SkShader_DEFINED
 #define SkShader_DEFINED
@@ skipping 345 matching lines @@
         kPerspective_MatrixClass        // slow perspective, need to mappoints each pixel
     };
     static MatrixClass ComputeMatrixClass(const SkMatrix&);
 
     // These can be called by your subclass after setContext() has been called
     uint8_t             getPaintAlpha() const { return fPaintAlpha; }
     SkBitmap::Config    getDeviceConfig() const { return (SkBitmap::Config)fDeviceConfig; }
     const SkMatrix&     getTotalInverse() const { return fTotalInverse; }
     MatrixClass         getInverseClass() const { return (MatrixClass)fTotalInverseClass; }
 
-    SkShader(SkFlattenableReadBuffer& );
-    virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
+    SkShader(SkReadBuffer& );
+    virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE;
 private:
     SkMatrix            fLocalMatrix;
     SkMatrix            fTotalInverse;
     uint8_t             fPaintAlpha;
     uint8_t             fDeviceConfig;
     uint8_t             fTotalInverseClass;
     SkDEBUGCODE(SkBool8 fInSetContext;)
 
     static SkShader* CreateBitmapShader(const SkBitmap& src,
                                         TileMode, TileMode,
                                         void* storage, size_t storageSize);
     friend class SkAutoBitmapShaderInstall;
     typedef SkFlattenable INHERITED;
 };
 
 #endif