1 files changed, 4 insertions, 0 deletions
diff --git a/tools/viewer/Slide.h b/tools/viewer/Slide.h
index e23a2eb78d..127b32da02 100644
--- a/tools/viewer/Slide.h
+++ b/tools/viewer/Slide.h
@@ -15,6 +15,7 @@
 
 class SkCanvas;
 class SkAnimTimer;
+class SkMetaData;
 
 class Slide : public SkRefCnt {
 public:
@@ -33,6 +34,9 @@ public:
     virtual bool onMouse(SkScalar x, SkScalar y, sk_app::Window::InputState state,
                          uint32_t modifiers) { return false; }
 
+    virtual bool onGetControls(SkMetaData*) { return false; }
+    virtual void onSetControls(const SkMetaData&) {}
+
     SkString getName() { return fName; }