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

components/sync_driver/shared_change_processor_ref.h

 // 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.
 
-#ifndef COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_REF_H_
-#define COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_REF_H_
+#ifndef COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_REF_H_
+#define COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_REF_H_
+
+#include <string>
 
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "components/sync_driver/shared_change_processor.h"
 #include "sync/api/sync_change_processor.h"
 #include "sync/api/sync_error_factory.h"
 
 namespace sync_driver {
 
 // A syncer::SyncChangeProcessor stub for interacting with a refcounted
@@ skipping 22 matching lines @@
       const std::string& message) override;
 
   // Default copy and assign welcome (and safe due to refcounted-ness).
 
  private:
   scoped_refptr<SharedChangeProcessor> change_processor_;
 };
 
 }  // namespace sync_driver
 
-#endif  // COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_H_REF_H_
+#endif  // COMPONENTS_SYNC_DRIVER_SHARED_CHANGE_PROCESSOR_REF_H_