Implement SkPicture::bytesUsed() for SkRecord backend

src/core/SkTileGrid.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 SkTileGrid_DEFINED
 #define SkTileGrid_DEFINED
 
@@ skipping 31 matching lines @@
 
     virtual int getCount() const SK_OVERRIDE { return fCount; }
 
     virtual int getDepth() const SK_OVERRIDE { return -1; }
 
     virtual void rewindInserts() SK_OVERRIDE;
 
     // For testing.
     int tileCount(int x, int y) { return fTiles[y * fXTiles + x].count(); }
 
+    virtual size_t bytesUsed() const SK_OVERRIDE;
+
 private:
     struct Entry {
         size_t order;  // Insertion order.  Used to preserve order when merging multiple tiles.
         void*  data;
     };
 
     const int fXTiles, fYTiles;
     SkTileGridFactory::TileGridInfo fInfo;
     size_t fCount;
 
     // (fXTiles * fYTiles) SkTDArrays, each listing data overlapping that tile in insertion order.
     SkTDArray<Entry>* fTiles;
 
     typedef SkBBoxHierarchy INHERITED;
 };
 
 #endif