[Web Payments] Refactor sheet display to allow updating view content

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

Index: chrome/browser/ui/views/payments/payment_sheet_view_controller.h
diff --git a/chrome/browser/ui/views/payments/payment_sheet_view_controller.h b/chrome/browser/ui/views/payments/payment_sheet_view_controller.h
index 57abcfb6af9c8d9af5dbf717374f068afdc0ecbe..e3d55ab8c9086aa54453f43b64519f08bde40535 100644
--- a/chrome/browser/ui/views/payments/payment_sheet_view_controller.h
+++ b/chrome/browser/ui/views/payments/payment_sheet_view_controller.h
@@ -28,20 +28,19 @@ class PaymentSheetViewController : public PaymentRequestSheetController,
                              PaymentRequestDialogView* dialog);
   ~PaymentSheetViewController() override;
 
-  // PaymentRequestSheetController:
-  std::unique_ptr<views::View> CreateView() override;
-
   // PaymentRequestState::Observer:
   void OnSelectedInformationChanged() override;
 
  private:
   // PaymentRequestSheetController:
   std::unique_ptr<views::Button> CreatePrimaryButton() override;
+  bool ShouldShowHeaderBackArrow() override;
+  base::string16 GetSheetTitle() override;
+  void FillContentView(views::View* content_view) override;
   std::unique_ptr<views::View> CreateExtraFooterView() override;
   void ButtonPressed(views::Button* sender, const ui::Event& event) override;
 
   void UpdatePayButtonState(bool enabled);
-  void UpdateContentView();
 
   std::unique_ptr<views::View> CreateShippingSectionContent();
   std::unique_ptr<views::Button> CreateShippingRow();
@@ -51,7 +50,6 @@ class PaymentSheetViewController : public PaymentRequestSheetController,
   std::unique_ptr<views::Button> CreateContactInfoRow();
   std::unique_ptr<views::Button> CreateShippingOptionRow();
 
-  std::unique_ptr<views::View> container_view_;
   views::Button* pay_button_;
 
   const int widest_name_column_view_width_;