Remove assumption about initial ordinals in app sync tests

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

Index: chrome/browser/sync/test/integration/two_client_apps_sync_test.cc
diff --git a/chrome/browser/sync/test/integration/two_client_apps_sync_test.cc b/chrome/browser/sync/test/integration/two_client_apps_sync_test.cc
index 782a63535ecf6187435cd45f78c0d5ff77e68951..475759a5465de745c5d8090fdac11b21180a9401 100644
--- a/chrome/browser/sync/test/integration/two_client_apps_sync_test.cc
+++ b/chrome/browser/sync/test/integration/two_client_apps_sync_test.cc
@@ -18,6 +18,7 @@ using apps_helper::CopyNTPOrdinals;
 using apps_helper::DisableApp;
 using apps_helper::EnableApp;
 using apps_helper::FixNTPOrdinalCollisions;
+using apps_helper::GetAppLaunchOrdinalForApp;
 using apps_helper::HasSameAppsAsVerifier;
 using apps_helper::IncognitoDisableApp;
 using apps_helper::IncognitoEnableApp;
@@ -368,14 +369,15 @@ IN_PROC_BROWSER_TEST_F(TwoClientAppsSyncTest, UpdateAppLaunchOrdinal) {
   ASSERT_TRUE(SetupSync());
   ASSERT_TRUE(AllProfilesHaveSameAppsAsVerifier());
 
-  syncer::StringOrdinal initial_position =
-      syncer::StringOrdinal::CreateInitialOrdinal();
   InstallApp(GetProfile(0), 0);
   InstallApp(GetProfile(1), 0);
   InstallApp(verifier(), 0);
   ASSERT_TRUE(AwaitQuiescence());
   ASSERT_TRUE(AllProfilesHaveSameAppsAsVerifier());
 
+  syncer::StringOrdinal initial_position =
+      GetAppLaunchOrdinalForApp(GetProfile(0), 0);
+
   syncer::StringOrdinal second_position = initial_position.CreateAfter();
   SetAppLaunchOrdinalForApp(GetProfile(0), 0, second_position);
   SetAppLaunchOrdinalForApp(verifier(), 0, second_position);