Inline ShouldDestroySessionAsynchronously as it has only one behavior.

PiperOrigin-RevId: 455627280

quiche/quic/core/quic_dispatcher.cc

diff --git a/quiche/quic/core/quic_dispatcher.cc b/quiche/quic/core/quic_dispatcher.cc
index 3d97b1e..30a93df 100644
--- a/quiche/quic/core/quic_dispatcher.cc
+++ b/quiche/quic/core/quic_dispatcher.cc
@@ -1064,15 +1064,13 @@
       << ", with details: " << error_details;
 
   QuicConnection* connection = it->second->connection();
-  if (ShouldDestroySessionAsynchronously()) {
-    // Set up alarm to fire immediately to bring destruction of this session
-    // out of current call stack.
-    if (closed_session_list_.empty()) {
-      delete_sessions_alarm_->Update(helper()->GetClock()->ApproximateNow(),
-                                     QuicTime::Delta::Zero());
-    }
-    closed_session_list_.push_back(std::move(it->second));
+  // Set up alarm to fire immediately to bring destruction of this session
+  // out of current call stack.
+  if (closed_session_list_.empty()) {
+    delete_sessions_alarm_->Update(helper()->GetClock()->ApproximateNow(),
+                                   QuicTime::Delta::Zero());
   }
+  closed_session_list_.push_back(std::move(it->second));
   CleanUpSession(it->first, connection, error, error_details, source);
   for (const QuicConnectionId& cid :
        connection->GetActiveServerConnectionIds()) {
@@ -1376,8 +1374,6 @@
   --new_sessions_allowed_per_event_loop_;
 }
 
-bool QuicDispatcher::ShouldDestroySessionAsynchronously() { return true; }
-
 void QuicDispatcher::SetLastError(QuicErrorCode error) { last_error_ = error; }
 
 bool QuicDispatcher::OnFailedToDispatchPacket(

quiche/quic/core/quic_dispatcher.h

diff --git a/quiche/quic/core/quic_dispatcher.h b/quiche/quic/core/quic_dispatcher.h
index f53df8b..0a103cd 100644
--- a/quiche/quic/core/quic_dispatcher.h
+++ b/quiche/quic/core/quic_dispatcher.h
@@ -244,10 +244,6 @@
   void ProcessChlo(ParsedClientHello parsed_chlo,
                    ReceivedPacketInfo* packet_info);
 
-  // Return true if dispatcher wants to destroy session outside of
-  // OnConnectionClosed() call stack.
-  virtual bool ShouldDestroySessionAsynchronously();
-
   QuicTimeWaitListManager* time_wait_list_manager() {
     return time_wait_list_manager_.get();
   }