Convert enable_pre_sync_backup flag to new flags system.

components/sync_driver/backup_rollback_controller_unittest.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 "components/sync_driver/backup_rollback_controller.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/location.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "components/sync_driver/signin_manager_wrapper.h"
+#include "components/sync_driver/sync_driver_features.h"
 #include "components/sync_driver/sync_driver_switches.h"
 #include "components/sync_driver/sync_prefs.h"
 #include "testing/gmock/include/gmock/gmock.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 using ::testing::Return;
 
 namespace {
 
-#if defined(ENABLE_PRE_SYNC_BACKUP)
+#if BUILDFLAG(ENABLE_PRE_SYNC_BACKUP)
 
 class MockSigninManagerWrapper : public SigninManagerWrapper {
  public:
   MockSigninManagerWrapper() : SigninManagerWrapper(NULL) {}
 
   MOCK_CONST_METHOD0(GetEffectiveUsername, std::string());
 };
 
 class FakeSyncPrefs : public sync_driver::SyncPrefs {
  public:
@@ skipping 103 matching lines @@
   EXPECT_FALSE(controller_->StartRollback());
   EXPECT_EQ(0, fake_prefs_.GetRemainingRollbackTries());
 
   PumpLoop();
   EXPECT_FALSE(rollback_started_);
 }
 
 #endif
 
 }  // anonymous namespace