Implement SkPicture::bytesUsed() for SkRecord backend

src/core/SkTileGrid.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 "SkTileGrid.h"
 
 SkTileGrid::SkTileGrid(int xTiles, int yTiles, const SkTileGridFactory::TileGridInfo& info)
@@ skipping 146 matching lines @@
 }
 
 void SkTileGrid::rewindInserts() {
     SkASSERT(fClient);
     for (int i = 0; i < fXTiles * fYTiles; i++) {
         while (!fTiles[i].isEmpty() && fClient->shouldRewind(fTiles[i].top().data)) {
             fTiles[i].pop();
         }
     }
 }
+
+size_t SkTileGrid::bytesUsed() const {
+    size_t byteCount = sizeof(SkTileGrid);
+
+    for (size_t i = 0; i < fCount; i++) {
+        byteCount = fTiles[i].reserved() * sizeof(Entry);
+    }
+
+    return byteCount;
+}
+