[WebPayments] Disabling done button when form invalid

chrome/browser/ui/views/payments/contact_info_editor_view_controller.h

 // Copyright 2017 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_VIEWS_PAYMENTS_CONTACT_INFO_EDITOR_VIEW_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_CONTACT_INFO_EDITOR_VIEW_CONTROLLER_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 32 matching lines @@
   std::unique_ptr<ValidationDelegate> CreateValidationDelegate(
       const EditorField& field) override;
   std::unique_ptr<ui::ComboboxModel> GetComboboxModelForType(
       const autofill::ServerFieldType& type) override;
 
  protected:
   // PaymentRequestSheetController:
   base::string16 GetSheetTitle() override;
 
  private:
-  bool ValidateModel();
   // Uses the values in the UI fields to populate the corresponding values in
   // |profile|.
   void PopulateProfile(autofill::AutofillProfile* profile);
   bool GetSheetId(DialogViewID* sheet_id) override;
 
   autofill::AutofillProfile* profile_to_edit_;
 
   // Called when |profile_to_edit_| was successfully edited.
   base::OnceClosure on_edited_;
   // Called when a new profile was added. The const reference is short-lived,
@@ skipping 24 matching lines @@
     EditorField field_;
     // Outlives this class. Never null.
     EditorViewController* controller_;
     const std::string& locale_;
   };
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_CONTACT_INFO_EDITOR_VIEW_CONTROLLER_H_