force readbuffer clients to use specialized readFoo for flattenables

src/core/SkFlattenableSerialization.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkFlattenableSerialization.h"
 
 #include "SkData.h"
 #include "SkFlattenable.h"
+#include "SkImageFilter.h"
 #include "SkOrderedReadBuffer.h"
 #include "SkOrderedWriteBuffer.h"
 
 SkData* SkSerializeFlattenable(SkFlattenable* flattenable) {
     SkOrderedWriteBuffer writer(1024);
     writer.setFlags(SkOrderedWriteBuffer::kCrossProcess_Flag);
     writer.writeFlattenable(flattenable);
     uint32_t size = writer.bytesWritten();
     void* data = sk_malloc_throw(size);
     writer.writeToMemory(data);
     return SkData::NewFromMalloc(data, size);
 }
 
+// TODO: this guy should be renamed to ImageFilter, or take SkEffectType as
+// a parameter.
 SkFlattenable* SkDeserializeFlattenable(const void* data, size_t size) {
     SkOrderedReadBuffer buffer(data, size);
-    return buffer.readFlattenable();
+    return buffer.readImageFilter();
 }