[Sync] Refactoring of sync integration test checkers to remove boilerplate await methods.

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

Index: chrome/browser/sync/test/integration/single_client_app_list_sync_test.cc
diff --git a/chrome/browser/sync/test/integration/single_client_app_list_sync_test.cc b/chrome/browser/sync/test/integration/single_client_app_list_sync_test.cc
index 3dd3b157ed66ec407403c94b117c5be3b6335713..7edc917dcc242a81a746f017d56a2c95e44cd92c 100644
--- a/chrome/browser/sync/test/integration/single_client_app_list_sync_test.cc
+++ b/chrome/browser/sync/test/integration/single_client_app_list_sync_test.cc
@@ -8,15 +8,13 @@
 #include "base/macros.h"
 #include "chrome/browser/sync/test/integration/apps_helper.h"
 #include "chrome/browser/sync/test/integration/sync_app_list_helper.h"
-#include "chrome/browser/sync/test/integration/sync_integration_test_util.h"
 #include "chrome/browser/sync/test/integration/sync_test.h"
+#include "chrome/browser/sync/test/integration/updated_progress_marker_checker.h"
 #include "chrome/browser/ui/app_list/app_list_syncable_service.h"
 #include "chrome/browser/ui/app_list/app_list_syncable_service_factory.h"
 #include "components/browser_sync/profile_sync_service.h"
 #include "ui/app_list/app_list_switches.h"
 
-using sync_integration_test_util::AwaitCommitActivityCompletion;
-
 namespace {
 
 const size_t kNumDefaultApps = 2;
@@ -72,6 +70,6 @@ IN_PROC_BROWSER_TEST_F(SingleClientAppListSyncTest, AppListSomeApps) {
       app_list::AppListSyncableServiceFactory::GetForProfile(verifier());
   ASSERT_EQ(kNumApps + kNumDefaultApps, service->GetNumSyncItemsForTest());
 
-  ASSERT_TRUE(AwaitCommitActivityCompletion(GetSyncService(0)));
+  ASSERT_TRUE(UpdatedProgressMarkerChecker(GetSyncService(0)).Wait());
   ASSERT_TRUE(AllProfilesHaveSameAppList());
 }