Scroll with Layers in views::ScrollView

ui/compositor/compositor.h

Index: ui/compositor/compositor.h
diff --git a/ui/compositor/compositor.h b/ui/compositor/compositor.h
index 1fa1bfc02a3efd96cd86b8c0edb6b93bcfbf27b8..252ca2d4371189b47ea08e4f70a3f4291aaa8864 100644
--- a/ui/compositor/compositor.h
+++ b/ui/compositor/compositor.h
@@ -51,6 +51,7 @@ class TaskGraphRunner;
 
 namespace gfx {
 class Rect;
+class ScrollOffset;
 class Size;
 }
 
@@ -266,6 +267,11 @@ class COMPOSITOR_EXPORT Compositor
   // Gets the visibility of the underlying compositor.
   bool IsVisible();
 
+  // Gets or sets the scroll offset for the given layer in step with the
+  // cc::InputHandler. Returns true if the layer is active on the impl side.
+  bool GetScrollOffsetForLayer(int layer_id, gfx::ScrollOffset* offset) const;
+  bool ScrollLayerTo(int layer_id, const gfx::ScrollOffset& offset);
+
   // The "authoritative" vsync interval, if provided, will override interval
   // reported from 3D context. This is typically the value reported by a more
   // reliable source, e.g, the platform display configuration.