chore: cherry-pick 3feda0244490 from chromium

patches/chromium/.patches

@@ -175,3 +175,4 @@ cherry-pick-b77b38a3380c.patch
 cherry-pick-d9556a80a790.patch
 cherry-pick-910e9e40d376.patch
 cherry-pick-ff0d013f60fa.patch
+cherry-pick-3feda0244490.patch

patches/chromium/cherry-pick-3feda0244490.patch

@@ -0,0 +1,39 @@
+From 3feda02444909f1c713264a5740ae43c0258815c Mon Sep 17 00:00:00 2001
+From: Reilly Grant <reillyg@chromium.org>
+Date: Mon, 28 Jun 2021 21:55:24 +0000
+Subject: [PATCH] serial: Fix parent class tracing for SerialPort
+
+When SerialPort was updated to be ActiveScriptWrappable and an
+EventTarget the Trace method was not updated to call the parent class
+trace methods.
+
+(cherry picked from commit 4059ecc3a5352601a4d79196f90c8ca19262afe1)
+
+Bug: 1220078
+Change-Id: If6967a913268bce86d4488359a9418a814530f84
+Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2965255
+Auto-Submit: Reilly Grant <reillyg@chromium.org>
+Commit-Queue: Tom Sepez <tsepez@chromium.org>
+Reviewed-by: Tom Sepez <tsepez@chromium.org>
+Cr-Original-Commit-Position: refs/heads/master@{#893039}
+Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2992740
+Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
+Commit-Queue: Reilly Grant <reillyg@chromium.org>
+Cr-Commit-Position: refs/branch-heads/4472@{#1531}
+Cr-Branched-From: 3d60439cfb36485e76a1c5bb7f513d3721b20da1-refs/heads/master@{#870763}
+---
+
+diff --git a/third_party/blink/renderer/modules/serial/serial_port.cc b/third_party/blink/renderer/modules/serial/serial_port.cc
+index 681820a..61fe614 100644
+--- a/third_party/blink/renderer/modules/serial/serial_port.cc
++++ b/third_party/blink/renderer/modules/serial/serial_port.cc
+@@ -508,7 +508,8 @@
+   visitor->Trace(open_resolver_);
+   visitor->Trace(signal_resolvers_);
+   visitor->Trace(close_resolver_);
+-  ScriptWrappable::Trace(visitor);
++  EventTargetWithInlineData::Trace(visitor);
++  ActiveScriptWrappable<SerialPort>::Trace(visitor);
+ }
+
+ bool SerialPort::HasPendingActivity() const {