[Sync] Fixing sync_driver lint violations and adding PRESUBMIT lint check.

components/sync_driver/backend_migrator.cc

 // Copyright (c) 2012 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/backend_migrator.h"
 
 #include "base/location.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/tracked_objects.h"
 #include "components/sync_driver/sync_service.h"
 #include "sync/internal_api/public/configure_reason.h"
 #include "sync/internal_api/public/read_transaction.h"
 #include "sync/protocol/sync.pb.h"
-#include "sync/syncable/directory.h" // TODO(tim): Bug 131130.
+#include "sync/syncable/directory.h"  // TODO(tim): Bug 131130.
 
 using syncer::ModelTypeSet;
 
 namespace browser_sync {
 
 using syncer::ModelTypeToString;
 
 MigrationObserver::~MigrationObserver() {}
 
 BackendMigrator::BackendMigrator(const std::string& name,
@@ skipping 187 matching lines @@
 
 syncer::ModelTypeSet BackendMigrator::GetPendingMigrationTypesForTest() const {
   return to_migrate_;
 }
 
 #undef SDVLOG
 
 #undef SLOG
 
 };  // namespace browser_sync