[Sync] Reduce SingleClientSessionsSyncTest.CookieJarMismatch test execution time

chrome/browser/sync/test/integration/single_client_sessions_sync_test.cc

Index: chrome/browser/sync/test/integration/single_client_sessions_sync_test.cc
diff --git a/chrome/browser/sync/test/integration/single_client_sessions_sync_test.cc b/chrome/browser/sync/test/integration/single_client_sessions_sync_test.cc
index db50a400ced88f9a1d448e0cec4f796de50c15a6..b21a6236f570b52178fd5cd798faaa103abe5e87 100644
--- a/chrome/browser/sync/test/integration/single_client_sessions_sync_test.cc
+++ b/chrome/browser/sync/test/integration/single_client_sessions_sync_test.cc
@@ -163,6 +163,7 @@ IN_PROC_BROWSER_TEST_F(SingleClientSessionsSyncTest, CookieJarMismatch) {
   ScopedWindowMap old_windows;
   GURL url = GURL("http://127.0.0.1/bubba");
   ASSERT_TRUE(OpenTabAndGetLocalWindows(0, url, old_windows.GetMutable()));
+  TriggerSyncForModelTypes(0, syncer::ModelTypeSet(syncer::SESSIONS));
   ASSERT_TRUE(AwaitCommitActivityCompletion(GetSyncService((0))));
 
   // The cookie jar mismatch value will be true by default due to
@@ -184,6 +185,7 @@ IN_PROC_BROWSER_TEST_F(SingleClientSessionsSyncTest, CookieJarMismatch) {
   // Trigger a sync and wait for it.
   url = GURL("http://127.0.0.1/bubba2");
   ASSERT_TRUE(OpenTabAndGetLocalWindows(0, url, old_windows.GetMutable()));
+  TriggerSyncForModelTypes(0, syncer::ModelTypeSet(syncer::SESSIONS));
   ASSERT_TRUE(AwaitCommitActivityCompletion(GetSyncService((0))));
 
   // Verify the cookie jar mismatch bool is set to false.