Revert of Simplify the logic in DesktopWindowTreeHostX11 for FocusOut

ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc

Index: ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
diff --git a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
index 005f3468f45499300cfe89cf79be854ed6b4fc2a..a3fd31102a55a63104d7403ddb8716f5063fb56e 100644
--- a/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
+++ b/ui/views/widget/desktop_aura/desktop_window_tree_host_x11.cc
@@ -1595,8 +1595,13 @@
       break;
     }
     case FocusOut:
-      ReleaseCapture();
-      X11DesktopHandler::get()->ProcessXEvent(xev);
+      if (xev->xfocus.mode != NotifyGrab) {
+        ReleaseCapture();
+        OnHostLostWindowCapture();
+        X11DesktopHandler::get()->ProcessXEvent(xev);
+      } else {
+        dispatcher()->OnHostLostMouseGrab();
+      }
       break;
     case FocusIn:
       X11DesktopHandler::get()->ProcessXEvent(xev);