Use SequenceChecker from public API

Bug: webrtc:12419
Change-Id: I00cca16a0ec70246156ba00b97aa7ae5ccbf5364
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/205323
Commit-Queue: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Tommi <tommi@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33220}
diff --git a/rtc_base/operations_chain.h b/rtc_base/operations_chain.h
index a7252d4..3dc5995 100644
--- a/rtc_base/operations_chain.h
+++ b/rtc_base/operations_chain.h
@@ -20,11 +20,11 @@
 
 #include "absl/types/optional.h"
 #include "api/scoped_refptr.h"
+#include "api/sequence_checker.h"
 #include "rtc_base/checks.h"
 #include "rtc_base/constructor_magic.h"
 #include "rtc_base/ref_count.h"
 #include "rtc_base/ref_counted_object.h"
-#include "rtc_base/synchronization/sequence_checker.h"
 #include "rtc_base/system/no_unique_address.h"
 
 namespace rtc {