Progress towards fixing 77536

ui/gfx/gtk_native_view_id_manager.h

Index: ui/gfx/gtk_native_view_id_manager.h
diff --git a/ui/gfx/gtk_native_view_id_manager.h b/ui/gfx/gtk_native_view_id_manager.h
index 462a51d7ef3212035efeceed686026aca3819326..6ea16a28ef852cb052c35e9adec974c3e8d301ae 100644
--- a/ui/gfx/gtk_native_view_id_manager.h
+++ b/ui/gfx/gtk_native_view_id_manager.h
@@ -72,6 +72,11 @@ class GtkNativeViewManager {
   // returns: true if |id| is a valid id, false otherwise.
   bool GetPermanentXIDForId(XID* xid, gfx::NativeViewId id);
 
+  // Can be called from any thread.
+  // Will return false if the given XID isn't permanent or has already been
+  // released.
+  bool AddRefPermanentXID(XID xid);
+
   // Must be called from the UI thread because we may need to access a
   // GtkWidget or destroy a GdkWindow.
   //