[Payments] Add a Pay button in the Order summary screen

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

Index: chrome/browser/ui/views/payments/payment_request_dialog_view.h
diff --git a/chrome/browser/ui/views/payments/payment_request_dialog_view.h b/chrome/browser/ui/views/payments/payment_request_dialog_view.h
index 53b784e84a856e8886c984e8f32311a932a3775d..8f295189694d1a2e8982640fcd76be3bbe480dfc 100644
--- a/chrome/browser/ui/views/payments/payment_request_dialog_view.h
+++ b/chrome/browser/ui/views/payments/payment_request_dialog_view.h
@@ -89,6 +89,10 @@ class PaymentRequestDialogView : public views::DialogDelegateView,
   // May be null.
   ObserverForTest* observer_for_testing_;
 
+  // Used when the dialog is being closed to avoid re-entrancy into the
+  // controller_map_.
+  bool being_closed_;
+
   DISALLOW_COPY_AND_ASSIGN(PaymentRequestDialogView);
 };