[Sync] Add client-side plumbing for server control of sessions commit delay

chrome/browser/sync/sessions/test_util.h

Index: chrome/browser/sync/sessions/test_util.h
diff --git a/chrome/browser/sync/sessions/test_util.h b/chrome/browser/sync/sessions/test_util.h
index 12a01190080e9c218b9c10ab99b37465ba376072..de222697747eaecda0d4fb374645c85bfa28543b 100644
--- a/chrome/browser/sync/sessions/test_util.h
+++ b/chrome/browser/sync/sessions/test_util.h
@@ -28,6 +28,8 @@ void SimulateThrottledImpl(sessions::SyncSession* session,
     const base::TimeDelta& delta);
 void SimulatePollIntervalUpdateImpl(sessions::SyncSession* session,
     const base::TimeDelta& new_poll);
+void SimulateSessionsCommitDelayUpdateImpl(sessions::SyncSession* session,
+    const base::TimeDelta& new_delay);
 
 ACTION_P(SimulateThrottled, throttle) {
   SimulateThrottledImpl(arg0, throttle);
@@ -37,6 +39,10 @@ ACTION_P(SimulatePollIntervalUpdate, poll) {
   SimulatePollIntervalUpdateImpl(arg0, poll);
 }
 
+ACTION_P(SimulateSessionsCommitDelayUpdate, poll) {
+  SimulateSessionsCommitDelayUpdateImpl(arg0, poll);
+}
+
 }  // namespace test_util
 }  // namespace sessions
 }  // namespace browser_sync