Sketch splitting SkPicture into an interface and SkBigPicture.

src/utils/SkPictureUtils.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 "SkBBoxHierarchy.h"
-#include "SkCanvas.h"
-#include "SkData.h"
-#include "SkPictureUtils.h"
-#include "SkRecord.h"
-#include "SkShader.h"
-
-size_t SkPictureUtils::ApproximateBytesUsed(const SkPicture* pict) {
-    size_t byteCount = sizeof(*pict);
-
-    byteCount += pict->fRecord->bytesUsed();
-    if (pict->fBBH.get()) {
-        byteCount += pict->fBBH->bytesUsed();
-    }
-    byteCount += pict->fApproxBytesUsedBySubPictures;
-
-    return byteCount;
-}