Revert of Convert enable_pre_sync_backup flag to new flags system.

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

Index: chrome/browser/sync/test/integration/single_client_backup_rollback_test.cc
diff --git a/chrome/browser/sync/test/integration/single_client_backup_rollback_test.cc b/chrome/browser/sync/test/integration/single_client_backup_rollback_test.cc
index 128fa9371ba63fd8382767c1bb5b797b450a47da..769326a89b3e9dd455412c97e5e7130b39782a2e 100644
--- a/chrome/browser/sync/test/integration/single_client_backup_rollback_test.cc
+++ b/chrome/browser/sync/test/integration/single_client_backup_rollback_test.cc
@@ -19,7 +19,6 @@
 #include "chrome/browser/sync/test/integration/sync_test.h"
 #include "components/bookmarks/browser/bookmark_model.h"
 #include "components/browser_sync/browser/profile_sync_service.h"
-#include "components/sync_driver/sync_driver_features.h"
 #include "components/sync_driver/sync_driver_switches.h"
 #include "sync/internal_api/public/util/sync_db_util.h"
 #include "sync/test/fake_server/fake_server_verifier.h"
@@ -159,7 +158,7 @@
   bool clear_done_;
 };
 
-#if BUILDFLAG(ENABLE_PRE_SYNC_BACKUP)
+#if defined(ENABLE_PRE_SYNC_BACKUP)
 #define MAYBE_TestBackup TestBackup
 #else
 #define MAYBE_TestBackup DISABLED_TestBackup
@@ -179,7 +178,7 @@
   ASSERT_EQ(backup_time, GetSyncService(0)->GetDeviceBackupTimeForTesting());
 }
 
-#if BUILDFLAG(ENABLE_PRE_SYNC_BACKUP)
+#if defined(ENABLE_PRE_SYNC_BACKUP)
 #define MAYBE_TestBackupDisabled TestBackupDisabled
 #else
 #define MAYBE_TestBackupDisabled DISABLED_TestBackupDisabled
@@ -199,7 +198,7 @@
   ASSERT_TRUE(GetSyncService(0)->GetDeviceBackupTimeForTesting().is_null());
 }
 
-#if BUILDFLAG(ENABLE_PRE_SYNC_BACKUP)
+#if defined(ENABLE_PRE_SYNC_BACKUP)
 #define MAYBE_TestRollback TestRollback
 #else
 #define MAYBE_TestRollback DISABLED_TestRollback
@@ -257,7 +256,7 @@
   ASSERT_EQ(GURL("http://www.nhl.com"), url2->url());
 }
 
-#if BUILDFLAG(ENABLE_PRE_SYNC_BACKUP)
+#if defined(ENABLE_PRE_SYNC_BACKUP)
 #define MAYBE_TestRollbackDisabled TestRollbackDisabled
 #else
 #define MAYBE_TestRollbackDisabled DISABLED_TestRollbackDisabled
@@ -306,7 +305,7 @@
             GetOtherNode(0)->GetChild(0)->url());
 }
 
-#if BUILDFLAG(ENABLE_PRE_SYNC_BACKUP)
+#if defined(ENABLE_PRE_SYNC_BACKUP)
 #define MAYBE_TestSyncDisabled TestSyncDisabled
 #else
 #define MAYBE_TestSyncDisabled DISABLED_TestSyncDisabled
@@ -353,7 +352,7 @@
             GetOtherNode(0)->GetChild(0)->url());
 }
 
-#if BUILDFLAG(ENABLE_PRE_SYNC_BACKUP)
+#if defined(ENABLE_PRE_SYNC_BACKUP)
 #define MAYBE_RollbackNoBackup RollbackNoBackup
 #else
 #define MAYBE_RollbackNoBackup DISABLED_RollbackNoBackup
@@ -400,7 +399,7 @@
             GetOtherNode(0)->GetChild(0)->url());
 }
 
-#if BUILDFLAG(ENABLE_PRE_SYNC_BACKUP)
+#if defined(ENABLE_PRE_SYNC_BACKUP)
 #define MAYBE_DontChangeBookmarkOrdering DontChangeBookmarkOrdering
 #else
 #define MAYBE_DontChangeBookmarkOrdering DISABLED_DontChangeBookmarkOrdering