Remove redundant update of viewport layer types

cc/layers/layer_impl.cc

Index: cc/layers/layer_impl.cc
diff --git a/cc/layers/layer_impl.cc b/cc/layers/layer_impl.cc
index 759108384e59caae768cac1627b96b5906d0baa8..16bab888a6577fb5c57e8b95c6042647b69c4801 100644
--- a/cc/layers/layer_impl.cc
+++ b/cc/layers/layer_impl.cc
@@ -280,9 +280,6 @@ void LayerImpl::SetScrollClipLayer(int scroll_clip_layer_id) {
   layer_tree_impl()->UnregisterScrollLayer(this);
   scroll_clip_layer_id_ = scroll_clip_layer_id;
   layer_tree_impl()->RegisterScrollLayer(this);
-
-  // Ensure our viewport layer type is updated.
-  layer_tree_impl()->UpdateViewportLayerTypes();
 }
 
 LayerImpl* LayerImpl::scroll_clip_layer() const {