Constify SkFlattenable::getFactory().

src/core/SkFlattenableBuffers.cpp

 
 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "SkFlattenableBuffers.h"
 #include "SkPaint.h"
 #include "SkTypeface.h"
@@ skipping 33 matching lines @@
 
 void SkFlattenableWriteBuffer::writeFunctionPtr(void* ptr) {
     void* ptrStorage[] = { ptr };
     this->writeByteArray(ptrStorage, sizeof(void*));
 }
 
 void SkFlattenableWriteBuffer::writePaint(const SkPaint& paint) {
     paint.flatten(*this);
 }
 
-void SkFlattenableWriteBuffer::flattenObject(SkFlattenable* obj, SkFlattenableWriteBuffer& buffer) {
+void SkFlattenableWriteBuffer::flattenObject(const SkFlattenable* obj,
+                                             SkFlattenableWriteBuffer& buffer) {
     obj->flatten(buffer);
 }