Focus first invalid field of payment request editor

chrome/browser/ui/views/payments/credit_card_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_CREDIT_CARD_EDITOR_VIEW_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_CREDIT_CARD_EDITOR_VIEW_CONTROLLER_H_
 
 #include <memory>
 #include <set>
 #include <string>
@@ skipping 60 matching lines @@
     // Used to validate |field| type. A reference to the |controller| should
     // outlive this delegate, and a list of |supported_card_networks| can be
     // passed in to validate |field| (the data will be copied to the delegate).
     CreditCardValidationDelegate(
         const EditorField& field,
         EditorViewController* controller,
         const std::vector<std::string>& supported_card_networks);
     ~CreditCardValidationDelegate() 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:
-    // Validates a specific |value|.
-    bool ValidateValue(const base::string16& value);
+    // Validates a specific |value|/|combobox|.
+    bool ValidateValue(const base::string16& value,
+                       base::string16* error_message);
+    bool ValidateCombobox(views::Combobox* combobox,
+                          base::string16* error_message);
 
     EditorField field_;
     // Outlives this class.
     EditorViewController* controller_;
     // The list of supported basic card networks.
     std::set<std::string> supported_card_networks_;
 
     DISALLOW_COPY_AND_ASSIGN(CreditCardValidationDelegate);
   };
 
@@ skipping 16 matching lines @@
 
   // The value to use for the add billing address button tag.
   int add_billing_address_button_tag_;
 
   DISALLOW_COPY_AND_ASSIGN(CreditCardEditorViewController);
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_CREDIT_CARD_EDITOR_VIEW_CONTROLLER_H_