Define a single macro for enabling backup function.

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/command_line.h"
 #include "base/message_loop/message_loop.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/test/integration/bookmarks_helper.h"
 #include "chrome/browser/sync/test/integration/sync_integration_test_util.h"
@@ skipping 55 matching lines @@
 
   bool IsBackupComplete() {
     return pss_->backend_mode() == ProfileSyncService::BACKUP &&
         pss_->ShouldPushChanges();
   }
 
   ProfileSyncService* pss_;
   base::TimeTicks expiration_;
 };
 
-#if defined(OS_WIN) || defined(OS_MACOSX) || (defined(OS_LINUX) && !defined(OS_CHROMEOS))
+#if defined(ENABLE_PRE_SYNC_BACKUP)
 #define MAYBE_TestBackupRollback TestBackupRollback
 #else
 #define MAYBE_TestBackupRollback DISABLED_TestBackupRollback
 #endif
 IN_PROC_BROWSER_TEST_F(SingleClientBackupRollbackTest,
                        MAYBE_TestBackupRollback) {
   ASSERT_TRUE(SetupClients()) << "SetupClients() failed.";
 
   // Starting state:
   // other_node
@@ skipping 37 matching lines @@
 
   // Verify bookmarks are restored.
   ASSERT_EQ(1, tier1_a->child_count());
   const BookmarkNode* url1 = tier1_a->GetChild(0);
   ASSERT_EQ(GURL("http://mail.google.com"), url1->url());
 
   ASSERT_EQ(1, tier1_b->child_count());
   const BookmarkNode* url2 = tier1_b->GetChild(0);
   ASSERT_EQ(GURL("http://www.nhl.com"), url2->url());
 }