[Sync] Fixing easy lint violations.

components/sync/core/internal_components_factory_impl.h

 // Copyright 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.
 //
 // An InternalComponentsFactory implementation designed for real production /
 // normal use.
 
 #ifndef COMPONENTS_SYNC_CORE_INTERNAL_COMPONENTS_FACTORY_IMPL_H_
 #define COMPONENTS_SYNC_CORE_INTERNAL_COMPONENTS_FACTORY_IMPL_H_
 
+#include <memory>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "components/sync/core/internal_components_factory.h"
 
 namespace syncer {
 
 class InternalComponentsFactoryImpl : public InternalComponentsFactory {
  public:
@@ skipping 22 matching lines @@
   Switches GetSwitches() const override;
 
  private:
   const Switches switches_;
   DISALLOW_COPY_AND_ASSIGN(InternalComponentsFactoryImpl);
 };
 
 }  // namespace syncer
 
 #endif  // COMPONENTS_SYNC_CORE_INTERNAL_COMPONENTS_FACTORY_IMPL_H_