Create a QUIC wrapper around a mutex and a mutex lock.

net/tools/quic/test_tools/server_thread.cc

Index: net/tools/quic/test_tools/server_thread.cc
diff --git a/net/tools/quic/test_tools/server_thread.cc b/net/tools/quic/test_tools/server_thread.cc
index 35421d12ea2aebd9884dbed12a2ad79121017030..a04311e944d1d0f500283d1291bd5bd3255d3034 100644
--- a/net/tools/quic/test_tools/server_thread.cc
+++ b/net/tools/quic/test_tools/server_thread.cc
@@ -71,7 +71,7 @@ int ServerThread::GetPort() {
 
 void ServerThread::Schedule(std::function<void()> action) {
   DCHECK(!quit_.IsSignaled());
-  base::AutoLock lock(scheduled_actions_lock_);
+  QuicWriterMutexLock lock(&scheduled_actions_lock_);
   scheduled_actions_.push_back(std::move(action));
 }
 
@@ -117,7 +117,7 @@ void ServerThread::MaybeNotifyOfHandshakeConfirmation() {
 void ServerThread::ExecuteScheduledActions() {
   std::deque<std::function<void()>> actions;
   {
-    base::AutoLock lock(scheduled_actions_lock_);
+    QuicWriterMutexLock lock(&scheduled_actions_lock_);
     actions.swap(scheduled_actions_);
   }
   while (!actions.empty()) {