[Web Payments] Handle "Enter" accelerator when there's a primary action

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 <vector>
@@ skipping 40 matching lines @@
       const EditorField& field) override;
   std::unique_ptr<ui::ComboboxModel> GetComboboxModelForType(
       const autofill::ServerFieldType& type) override;
   void OnPerformAction(views::Combobox* combobox) override;
   void UpdateEditorView() override;
 
   // PaymentRequestSheetController:
   base::string16 GetSheetTitle() override;
 
  private:
+  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;
@@ skipping 58 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_