Fix msvc compilation error.

a-siva · Commit Queue · commit 251ca0b6886d · 2025-07-23T16:13:29.000-07:00
TEST=ci Change-Id: I496f368ae513d5d84f7ec6eccb7b1fa219658c81 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/441834 Reviewed-by: Ryan Macnak <rmacnak@google.com> Commit-Queue: Siva Annamalai <asiva@google.com>
diff --git a/samples/embedder/run_timer.cc b/samples/embedder/run_timer.cc
@@ -2,6 +2,7 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
+#include <atomic>
 #include <condition_variable>
 #include <iostream>
 #include <mutex>
