Route selection bounds updates through the compositor

cc/trees/layer_tree_host_impl.cc

Index: cc/trees/layer_tree_host_impl.cc
diff --git a/cc/trees/layer_tree_host_impl.cc b/cc/trees/layer_tree_host_impl.cc
index 94d2864c696535575997ee2d32c898b0d00816eb..25bc669cfc4de29dceb2b182a3eb7fbfbb1084e3 100644
--- a/cc/trees/layer_tree_host_impl.cc
+++ b/cc/trees/layer_tree_host_impl.cc
@@ -1381,6 +1381,9 @@ CompositorFrameMetadata LayerTreeHostImpl::MakeCompositorFrameMetadata() const {
     metadata.overdraw_bottom_height = overdraw_bottom_height_;
   }
 
+  active_tree_->GetViewportSelection(&metadata.selection_anchor,
+                                     &metadata.selection_focus);
+
   if (!InnerViewportScrollLayer())
     return metadata;