[Payments] Refactor into PaymentRequestState and Spec

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

Index: chrome/browser/ui/views/payments/order_summary_view_controller.h
diff --git a/chrome/browser/ui/views/payments/order_summary_view_controller.h b/chrome/browser/ui/views/payments/order_summary_view_controller.h
index 7f602386d7dfd3debd2890da11afa3f70890725e..590812415e03dd366c9229ec6b1515a6cebe4e00 100644
--- a/chrome/browser/ui/views/payments/order_summary_view_controller.h
+++ b/chrome/browser/ui/views/payments/order_summary_view_controller.h
@@ -8,6 +8,7 @@
 #include "base/macros.h"
 #include "chrome/browser/ui/views/payments/payment_request_sheet_controller.h"
 #include "components/payments/content/payment_request.h"
+#include "components/payments/content/payment_request_state.h"
 
 namespace payments {
 
@@ -17,7 +18,7 @@ class PaymentRequestDialogView;
 // The PaymentRequestSheetController subtype for the Order Summary screen of the
 // Payment Request flow.
 class OrderSummaryViewController : public PaymentRequestSheetController,
-                                   public PaymentRequest::Observer {
+                                   public PaymentRequestState::Observer {
  public:
   // Does not take ownership of the arguments, which should outlive this object.
   OrderSummaryViewController(PaymentRequest* request,
@@ -28,7 +29,7 @@ class OrderSummaryViewController : public PaymentRequestSheetController,
   std::unique_ptr<views::View> CreateView() override;
   std::unique_ptr<views::Button> CreatePrimaryButton() override;
 
-  // PaymentRequest::Observer:
+  // PaymentRequestState::Observer:
   void OnSelectedInformationChanged() override;
 
  private: