[Payments] Desktop: never return false in incognito mode for canMakePayment

components/payments/content/payment_request_delegate.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 COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_DELEGATE_H_
 #define COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_DELEGATE_H_
 
 #include <string>
 
 namespace autofill {
@@ skipping 13 matching lines @@
 
   // Closes the same dialog that was opened by this delegate. Must be safe to
   // call when the dialog is not showing.
   virtual void CloseDialog() = 0;
 
   // Gets the PersonalDataManager associated with this PaymentRequest flow.
   // Cannot be null.
   virtual autofill::PersonalDataManager* GetPersonalDataManager() = 0;
 
   virtual const std::string& GetApplicationLocale() const = 0;
+
+  // Returns whether the user is in Incognito mode.
+  virtual bool IsIncognito() const = 0;
 };
 
 }  // namespace payments
 
 #endif  // COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_DELEGATE_H_