Refactor read and write buffers.

src/images/SkImageRef_ashmem.cpp

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkImageRef_ashmem.h"
 #include "SkImageDecoder.h"
-#include "SkFlattenableBuffers.h"
+#include "SkReadBuffer.h"
+#include "SkWriteBuffer.h"
 #include "SkThread.h"
 
 #include "android/ashmem.h"
 
 #include <sys/mman.h>
 #include <unistd.h>
 
 //#define TRACE_ASH_PURGE     // just trace purges
 
 #ifdef DUMP_IMAGEREF_LIFECYCLE
@@ skipping 182 matching lines @@
 
         ashmem_unpin_region(fRec.fFD, 0, 0);
         fRec.fPinned = false;
     }
 
     // we clear this with or without an error, since we've either closed or
     // unpinned the region
     fBitmap.setPixels(NULL, NULL);
 }
 
-void SkImageRef_ashmem::flatten(SkFlattenableWriteBuffer& buffer) const {
+void SkImageRef_ashmem::flatten(SkWriteBuffer& buffer) const {
     this->INHERITED::flatten(buffer);
     buffer.writeString(getURI());
 }
 
-SkImageRef_ashmem::SkImageRef_ashmem(SkFlattenableReadBuffer& buffer)
+SkImageRef_ashmem::SkImageRef_ashmem(SkReadBuffer& buffer)
         : INHERITED(buffer) {
     fRec.fFD = -1;
     fRec.fAddr = NULL;
     fRec.fSize = 0;
     fRec.fPinned = false;
     fCT = NULL;
 
     SkString uri;
     buffer.readString(&uri);
     this->setURI(uri);
 }