Focus first invalid field of payment request editor

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

Index: chrome/browser/ui/views/payments/contact_info_editor_view_controller.h
diff --git a/chrome/browser/ui/views/payments/contact_info_editor_view_controller.h b/chrome/browser/ui/views/payments/contact_info_editor_view_controller.h
index 5a0ab4af144708bc4d35814f5efc41377a966756..cebd7e7621235621ceffff3574abd9ddeeed6fec 100644
--- a/chrome/browser/ui/views/payments/contact_info_editor_view_controller.h
+++ b/chrome/browser/ui/views/payments/contact_info_editor_view_controller.h
@@ -72,11 +72,16 @@ class ContactInfoEditorViewController : public EditorViewController {
     ~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_;