[Payments] Adjust the UI fit the mocks better

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

 // Copyright 2016 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_PAYMENT_REQUEST_SHEET_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_SHEET_CONTROLLER_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 15 matching lines @@
  public:
   // Objects of this class are owned by |dialog|, so it's a non-owned pointer
   // that should be valid throughout this object's lifetime.
   // |request| is also not owned by this and is guaranteed to outlive dialog.
   // Neither |request| or |dialog| should be null.
   PaymentRequestSheetController(PaymentRequest* request,
                                 PaymentRequestDialogView* dialog);
   ~PaymentRequestSheetController() override {}
 
   virtual std::unique_ptr<views::View> CreateView() = 0;
+  // A leading view to complement the button(s). See CreateFooterView for how
+  // this is used and what insets are already applied.
+  virtual std::unique_ptr<views::View> CreateLeadingFooterView();
 
   // The PaymentRequest object associated with this instance of the dialog.
   // Caller should not take ownership of the result.
   PaymentRequest* request() { return request_; }
 
   // The dialog that contains and owns this object.
   // Caller should not take ownership of the result.
   PaymentRequestDialogView* dialog() { return dialog_; }
 
  protected:
@@ skipping 37 matching lines @@
   PaymentRequest* request_;
   // Not owned. Will outlive this.
   PaymentRequestDialogView* dialog_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentRequestSheetController);
 };
 
 }  // namespace payments
 
 #endif  // CHROME_BROWSER_UI_VIEWS_PAYMENTS_PAYMENT_REQUEST_SHEET_CONTROLLER_H_