Compositor hit-testing considers scrollable layers that scroll a drawn RSLL

cc/layers/draw_properties.h

Index: cc/layers/draw_properties.h
diff --git a/cc/layers/draw_properties.h b/cc/layers/draw_properties.h
index ff5abd95a5474e76aa0ef2831d3dc86c13bbff48..930f7bf0e95a29119937d0ad85adff2193f2959e 100644
--- a/cc/layers/draw_properties.h
+++ b/cc/layers/draw_properties.h
@@ -32,6 +32,7 @@ struct CC_EXPORT DrawProperties {
         num_unclipped_descendants(0),
         layer_or_descendant_has_copy_request(false),
         layer_or_descendant_has_input_handler(false),
+        layer_or_descendant_is_drawn(false),
         has_child_with_a_scroll_parent(false),
         sorted_for_recursion(false),
         visited(false),
@@ -114,6 +115,9 @@ struct CC_EXPORT DrawProperties {
   // If true, the layer or one of its descendants has a wheel or touch handler.
   bool layer_or_descendant_has_input_handler;
 
+  // If true, the layer or one of its descendants is drawn
+  bool layer_or_descendant_is_drawn;
+
   // This is true if the layer has any direct child that has a scroll parent.
   // This layer will not be the scroll parent in this case. This information
   // lets us avoid work in CalculateDrawPropertiesInternal -- if none of our