Blink handle selection handle visibility

cc/ipc/selection_struct_traits.h

Index: cc/ipc/selection_struct_traits.h
diff --git a/cc/ipc/selection_struct_traits.h b/cc/ipc/selection_struct_traits.h
index c5d52f780fc48537b9e17958380b8d2ab169bc6a..4a35d48a21d3bfd0580d4825039b55766038672f 100644
--- a/cc/ipc/selection_struct_traits.h
+++ b/cc/ipc/selection_struct_traits.h
@@ -31,6 +31,11 @@ struct StructTraits<cc::mojom::Selection, cc::Selection<gfx::SelectionBound>> {
     return selection.is_empty_text_form_control;
   }
 
+  static bool is_handle_visible(
+      const cc::Selection<gfx::SelectionBound>& selection) {
+    return selection.is_handle_visible;
+  }
+
   static bool Read(cc::mojom::SelectionDataView data,
                    cc::Selection<gfx::SelectionBound>* out) {
     if (!data.ReadStart(&out->start) || !data.ReadEnd(&out->end))
@@ -38,6 +43,7 @@ struct StructTraits<cc::mojom::Selection, cc::Selection<gfx::SelectionBound>> {
 
     out->is_editable = data.is_editable();
     out->is_empty_text_form_control = data.is_empty_text_form_control();
+    out->is_handle_visible = data.is_handle_visible();
     return true;
   }
 };