Focus first invalid field of payment request editor

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 54 matching lines @@
   base::OnceCallback<void(const autofill::AutofillProfile&)> on_added_;
 
   class ContactInfoValidationDelegate : public ValidationDelegate {
    public:
     ContactInfoValidationDelegate(const EditorField& field,
                                   const std::string& locale,
                                   EditorViewController* controller);
     ~ContactInfoValidationDelegate() override;
 
     // ValidationDelegate:
-    bool ValidateTextfield(views::Textfield* textfield) override;
-    bool ValidateCombobox(views::Combobox* combobox) override;
+    bool IsValidTextfield(views::Textfield* textfield) override;
+    bool IsValidCombobox(views::Combobox* combobox) override;
+    bool TextfieldValueChanged(views::Textfield* textfield) override;
+    bool ComboboxValueChanged(views::Combobox* combobox) override;
     void ComboboxModelChanged(views::Combobox* combobox) override {}
 
    private:
+    bool ValidateTextfield(views::Textfield* textfield,
+                           base::string16* error_message);
+
     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_