Refactor read and write buffers.

include/effects/SkStippleMaskFilter.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 SkStippleMaskFilter_DEFINED
 #define SkStippleMaskFilter_DEFINED
 
@@ skipping 13 matching lines @@
 
     // getFormat is from SkMaskFilter
     virtual SkMask::Format getFormat() const SK_OVERRIDE {
         return SkMask::kA8_Format;
     }
 
     SkDEVCODE(virtual void toString(SkString* str) const SK_OVERRIDE;)
     SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkStippleMaskFilter);
 
 protected:
-    SkStippleMaskFilter(SkFlattenableReadBuffer& buffer)
+    SkStippleMaskFilter(SkReadBuffer& buffer)
     : SkMaskFilter(buffer) {
     }
 
 private:
     typedef SkMaskFilter INHERITED;
 };
 
 #endif // SkStippleMaskFilter_DEFINED