cc: Add checker-imaging support to TileManager.

cc/trees/layer_tree_settings.cc

Index: cc/trees/layer_tree_settings.cc
diff --git a/cc/trees/layer_tree_settings.cc b/cc/trees/layer_tree_settings.cc
index 84b934d283739324bd52ae1ff1870d7a6e09a5c0..111483b2de4a43434b305a783447d2f782961b13 100644
--- a/cc/trees/layer_tree_settings.cc
+++ b/cc/trees/layer_tree_settings.cc
@@ -96,4 +96,13 @@ SchedulerSettings LayerTreeSettings::ToSchedulerSettings() const {
   return scheduler_settings;
 }
 
+TileManagerSettings LayerTreeSettings::ToTileManagerSettings() const {
+  TileManagerSettings tile_manager_settings;
+  tile_manager_settings.use_partial_raster = use_partial_raster;
+  tile_manager_settings.check_tile_priority_inversion =
+      check_tile_priority_inversion;
+  tile_manager_settings.enable_checker_imaging = enable_checker_imaging;
+  return tile_manager_settings;
+}
+
 }  // namespace cc