[Aura] Fix window resize handling on fullscreen event

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 1fd497f8b0197acafe82684fec3ffbc2739a1352..1040ec931d69fdfd15d558cf780693ccb630d578 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
@@ -705,6 +705,8 @@ void DesktopWindowTreeHostX11::SetFullscreen(bool fullscreen) {
   if (is_fullscreen_ == fullscreen)
     return;
   is_fullscreen_ = fullscreen;
+  if (is_fullscreen_)
+    delayed_resize_task_.Cancel();
 
   // Work around a bug where if we try to unfullscreen, metacity immediately
   // fullscreens us again. This is a little flickery and not necessary if