Auto merge of #22634 - aditj:aditj-patch-2, r=ferjm

Comments

Regarding  clarify layout-thread exit workflow (Specifically:when will a Exit message be received )

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- [X] These changes fix #22475 (GitHub issue number if applicable)

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components/layout_thread/lib.rs

@@ -789,6 +789,7 @@ impl LayoutThread {
                 self.prepare_to_exit(response_chan);
                 return false;
             },
+            // Receiving the Exit message at this stage only happens when layout is undergoing a "force exit".
             Msg::ExitNow => {
                 debug!("layout: ExitNow received");
                 self.exit_now();