Implement SkPicture::bytesUsed() for SkRecord backend

src/utils/SkPictureUtils.cpp

Index: src/utils/SkPictureUtils.cpp
diff --git a/src/utils/SkPictureUtils.cpp b/src/utils/SkPictureUtils.cpp
index dfa772a2da5be93e24bc645608c41052218f6822..337991e588f2974a802133c4526a93512fb9c191 100644
--- a/src/utils/SkPictureUtils.cpp
+++ b/src/utils/SkPictureUtils.cpp
@@ -5,6 +5,7 @@
  * found in the LICENSE file.
  */
 
+#include "SkBBoxHierarchy.h"
 #include "SkBitmapDevice.h"
 #include "SkCanvas.h"
 #include "SkData.h"
@@ -12,6 +13,7 @@
 #include "SkPictureUtils.h"
 #include "SkPixelRef.h"
 #include "SkRRect.h"
+#include "SkRecord.h"
 #include "SkShader.h"
 
 class PixelRefSet {
@@ -215,3 +217,13 @@ SkData* SkPictureUtils::GatherPixelRefs(const SkPicture* pict, const SkRect& are
     }
     return data;
 }
+
+size_t SkPictureUtils::approximateBytesUsed(const SkPicture* pict) {
+    size_t byteCount = sizeof(*pict);
+
+    byteCount += pict->fRecord->bytesUsed();
+    if (pict->fBBH.get()) {
+        byteCount += pict->fBBH->bytesUsed();
+    }
+    return byteCount;
+}