message: Fix for sanitizer bot failure in AudioUsesAbsSendTimeExtension
  Cr-Commit-Position: refs/heads/master@{#28981}
diff: @@ -72,6 +72,8 @@ TEST(RemoteEstimateEndToEnd, OfferedCapabilityIsInAnswer) {
  TEST(RemoteEstimateEndToEnd, AudioUsesAbsSendTimeExtension) {
  ScopedFieldTrials trials("WebRTC-KeepAbsSendTimeExtension/Enabled/");
  + // Defined before PeerScenario so it gets destructed after, to avoid use after free.
  + rtc::Event received_abs_send_time;
  PeerScenario s;
  auto* caller = s.CreateClient(PeerScenarioClient::Config());
  @@ -99,7 +101,6 @@ TEST(RemoteEstimateEndToEnd, AudioUsesAbsSendTimeExtension) {
  offer_exchange_done.Set();
  });
  EXPECT_TRUE(s.WaitAndProcess(&offer_exchange_done));
  - rtc::Event received_abs_send_time;
  send_node->router()->SetWatcher(
  [extension_map, &received_abs_send_time](const EmulatedIpPacket& packet) {
  auto extensions = GetRtpPacketExtensions(packet.data, extension_map);
  