[Autofill] Move country combo box model from chrome to component.

chrome/browser/ui/autofill/country_combobox_model.h

-// 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.
-
-#ifndef CHROME_BROWSER_UI_AUTOFILL_COUNTRY_COMBOBOX_MODEL_H_
-#define CHROME_BROWSER_UI_AUTOFILL_COUNTRY_COMBOBOX_MODEL_H_
-
-#include <memory>
-#include <set>
-#include <string>
-#include <vector>
-
-#include "base/callback.h"
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "base/memory/scoped_vector.h"
-#include "ui/base/models/combobox_model.h"
-
-namespace autofill {
-
-class AutofillCountry;
-class PersonalDataManager;
-
-// A model for countries to be used to enter addresses.
-class CountryComboboxModel : public ui::ComboboxModel {
- public:
-  using CountryVector = std::vector<std::unique_ptr<AutofillCountry>>;
-
-  CountryComboboxModel();
-  ~CountryComboboxModel() override;
-
-  // |filter| is passed each known country's country code. If |filter| returns
-  // true, an item for that country is added to the model (else it's omitted).
-  // |manager| determines the default choice.
-  void SetCountries(const PersonalDataManager& manager,
-                    const base::Callback<bool(const std::string&)>& filter);
-
-  // ui::ComboboxModel implementation:
-  int GetItemCount() const override;
-  base::string16 GetItemAt(int index) override;
-  bool IsItemSeparatorAt(int index) override;
-
-  const CountryVector& countries() const { return countries_; }
-
-  // Returns the default country code for this model.
-  std::string GetDefaultCountryCode() const;
-
- private:
-  // The countries to show in the model, including NULL for entries that are
-  // not countries (the separator entry).
-  CountryVector countries_;
-
-  DISALLOW_COPY_AND_ASSIGN(CountryComboboxModel);
-};
-
-}  // namespace autofill
-
-#endif  // CHROME_BROWSER_UI_AUTOFILL_COUNTRY_COMBOBOX_MODEL_H_