Optionally enable SkValidatingReadBuffer in SkPictureImageFilter

src/core/SkPicturePlayback.h

Index: src/core/SkPicturePlayback.h
diff --git a/src/core/SkPicturePlayback.h b/src/core/SkPicturePlayback.h
index 7cedaeb499f3cf801c30d1759f3b9b18c01c5556..6daeeeefd8377b6e932bb61a925f3c7c3139d580 100644
--- a/src/core/SkPicturePlayback.h
+++ b/src/core/SkPicturePlayback.h
@@ -16,15 +16,14 @@ class SkPaint;
 class SkPictureData;
 
 // The basic picture playback class replays the provided picture into a canvas.
-class SkPicturePlayback : SkNoncopyable {
+class SkPicturePlayback final : SkNoncopyable {
 public:
     SkPicturePlayback(const SkPictureData* data)
         : fPictureData(data)
         , fCurOffset(0) {
     }
-    virtual ~SkPicturePlayback() { }
 
-    virtual void draw(SkCanvas* canvas, SkPicture::AbortCallback*);
+    void draw(SkCanvas* canvas, SkPicture::AbortCallback*, const SkReadBuffer* buffer);
 
     // TODO: remove the curOp calls after cleaning up GrGatherDevice
     // Return the ID of the operation currently being executed when playing