Focus first invalid field of payment request editor

chrome/browser/ui/views/payments/shipping_address_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_SHIPPING_ADDRESS_EDITOR_VIEW_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_SHIPPING_ADDRESS_EDITOR_VIEW_CONTROLLER_H_
 
 #include <memory>
 #include <string>
 #include <utility>
@@ skipping 53 matching lines @@
   bool GetSheetId(DialogViewID* sheet_id) override;
 
   class ShippingAddressValidationDelegate : public ValidationDelegate {
    public:
     ShippingAddressValidationDelegate(
         ShippingAddressEditorViewController* parent,
         const EditorField& field);
     ~ShippingAddressValidationDelegate() 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 ValidateValue(const base::string16& value);
+    bool ValidateValue(const base::string16& value,
+                       base::string16* error_message);
 
     EditorField field_;
 
     // Raw pointer back to the owner of this class, therefore will not be null.
     ShippingAddressEditorViewController* controller_;
 
     DISALLOW_COPY_AND_ASSIGN(ShippingAddressValidationDelegate);
   };
   friend class ShippingAddressValidationDelegate;
 
@@ skipping 52 matching lines @@
 
   // Failed to fetch the region data in time.
   void RegionDataLoadTimedOut();
 
   DISALLOW_COPY_AND_ASSIGN(ShippingAddressEditorViewController);
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_SHIPPING_ADDRESS_EDITOR_VIEW_CONTROLLER_H_