[RootLayerScrolls] Annotate non-fast-scroll regions to correct layer

third_party/WebKit/Source/core/frame/FrameView.h

Index: third_party/WebKit/Source/core/frame/FrameView.h
diff --git a/third_party/WebKit/Source/core/frame/FrameView.h b/third_party/WebKit/Source/core/frame/FrameView.h
index b427e64bb1d0c3d28b2ba8f374ea49574d3f494d..84c8acb4a780aa53394815ee09202948c46764d5 100644
--- a/third_party/WebKit/Source/core/frame/FrameView.h
+++ b/third_party/WebKit/Source/core/frame/FrameView.h
@@ -454,6 +454,8 @@ class CORE_EXPORT FrameView final
                             const ScrollAlignment& alignY,
                             ScrollType = ProgrammaticScroll) override;
 
+  ClientRectList* nonFastScrollableRects() const override;
+
   // The window that hosts the FrameView. The FrameView will communicate scrolls
   // and repaints to the host window in the window's coordinate space.
   HostWindow* getHostWindow() const;