Constify SkFlattenable::getFactory().

include/core/SkFlattenableBuffers.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 SkFlattenableBuffers_DEFINED
 #define SkFlattenableBuffers_DEFINED
@@ skipping 164 matching lines @@
     virtual void writeScalarArray(const SkScalar* value, uint32_t count) = 0;
     virtual void writeInt(int32_t value) = 0;
     virtual void writeIntArray(const int32_t* value, uint32_t count) = 0;
     virtual void writeUInt(uint32_t value) = 0;
     virtual void write32(int32_t value) = 0; // printf in hex
     virtual void writeString(const char* value) = 0;
     virtual void writeEncodedString(const void* value, size_t byteLength,
                                     SkPaint::TextEncoding encoding) = 0;
 
     // common data structures
-    virtual void writeFlattenable(SkFlattenable* flattenable) = 0;
+    virtual void writeFlattenable(const SkFlattenable* flattenable) = 0;
     virtual void writeColor(const SkColor& color) = 0;
     virtual void writeColorArray(const SkColor* color, uint32_t count) = 0;
     virtual void writePoint(const SkPoint& point) = 0;
     virtual void writePointArray(const SkPoint* points, uint32_t count) = 0;
     virtual void writeMatrix(const SkMatrix& matrix) = 0;
     virtual void writeIRect(const SkIRect& rect) = 0;
     virtual void writeRect(const SkRect& rect) = 0;
     virtual void writeRegion(const SkRegion& region) = 0;
     virtual void writePath(const SkPath& path) = 0;
     virtual size_t writeStream(SkStream* stream, size_t length) = 0;
@@ skipping 19 matching lines @@
     }
 
     bool persistTypeface() const { return (fFlags & kCrossProcess_Flag) != 0; }
 
     void writeDataAsByteArray(SkData* data) {
         this->writeByteArray(data->data(), data->size());
     }
 
 protected:
     // A helper function so that each subclass does not have to be a friend of SkFlattenable
-    void flattenObject(SkFlattenable* obj, SkFlattenableWriteBuffer& buffer);
+    void flattenObject(const SkFlattenable* obj, SkFlattenableWriteBuffer& buffer);
 
     uint32_t fFlags;
 };
 
 #endif