cc: Rework how picture layer tiling set gets into raster queues.

cc/trees/layer_tree_impl.h

Index: cc/trees/layer_tree_impl.h
diff --git a/cc/trees/layer_tree_impl.h b/cc/trees/layer_tree_impl.h
index 232913933965f14c223c1ba7e83579783ebdecad..525207258a097e44c14b1fc001d46d4abd8ca9a6 100644
--- a/cc/trees/layer_tree_impl.h
+++ b/cc/trees/layer_tree_impl.h
@@ -300,9 +300,6 @@ class CC_EXPORT LayerTreeImpl {
   void GetViewportSelection(ViewportSelectionBound* start,
                             ViewportSelectionBound* end);
 
-  void RegisterPictureLayerImpl(PictureLayerImpl* layer);
-  void UnregisterPictureLayerImpl(PictureLayerImpl* layer);
-
   void set_top_controls_shrink_blink_size(bool shrink) {
     top_controls_shrink_blink_size_ = shrink;
   }