diff --git a/chrome/browser/ui/views/frame/browser_desktop_window_tree_host_linux.cc b/chrome/browser/ui/views/frame/browser_desktop_window_tree_host_linux.cc
index 53816cc50e833..b1afcb1a5941b 100644
--- a/chrome/browser/ui/views/frame/browser_desktop_window_tree_host_linux.cc
+++ b/chrome/browser/ui/views/frame/browser_desktop_window_tree_host_linux.cc
@@ -141,7 +141,13 @@ void BrowserDesktopWindowTreeHostLinux::TabDraggingKindChanged(
         browser_widget_->tab_drag_kind() == TabDragKind::kAllTabs;
     bool is_dragging_window = tab_drag_kind == TabDragKind::kAllTabs;
     if (is_dragging_window != was_dragging_window) {
+      auto weak_ptr = GetWeakPtr();
       x11_extension->SetOverrideRedirect(is_dragging_window);
+      // SetOverrideRedirect() → Map() can synchronously dispatch a bounds
+      // change that destroys |this| (and the platform window).
+      if (!weak_ptr) {
+        return;
+      }
     }
   }
 
diff --git a/ui/ozone/platform/x11/x11_window.cc b/ui/ozone/platform/x11/x11_window.cc
index 57ffaee839fc4..26ff22dc7acbb 100644
--- a/ui/ozone/platform/x11/x11_window.cc
+++ b/ui/ozone/platform/x11/x11_window.cc
@@ -1333,7 +1333,13 @@ void X11Window::SetOverrideRedirect(bool override_redirect) {
       .override_redirect = x11::Bool32(override_redirect),
   });
   if (remap) {
+    auto weak_this = weak_ptr_factory_.GetWeakPtr();
     Map();
+    // Map() → GetBoundsInPixels() → GeometryCache::GetBoundsPx() can re-enter
+    // OnBoundsChanged() and synchronously destroy |this| (crbug.com/1068755).
+    if (!weak_this) {
+      return;
+    }
     // We cannot regrab the pointer now since unmapping/mapping
     // happens asynchronously.  We must wait until the window is
     // mapped to issue a grab request.