[Web Payments] Add data attribution string to dialog

components/payments/content/payment_request_state.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_STATE_H_
 #define COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_STATE_H_
 
 #include <memory>
 #include <string>
 #include <vector>
@@ skipping 77 matching lines @@
 
   // Returns whether the user has at least one instrument that satisfies the
   // specified supported payment methods.
   bool CanMakePayment() const;
 
   // Returns true if the payment methods that the merchant website have
   // requested are supported. For example, may return true for "basic-card", but
   // false for "https://bobpay.com".
   bool AreRequestedMethodsSupported() const;
 
+  // Returns authenticated user email, or empty string.
+  std::string GetAuthenticatedEmail() const;
+
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   // Initiates the generation of the PaymentResponse. Callers should check
   // |is_ready_to_pay|, which is inexpensive.
   void GeneratePaymentResponse();
 
   // Gets the Autofill Profile representing the shipping address or contact
   // information currently selected for this PaymentRequest flow. Can return
   // null.
@@ skipping 111 matching lines @@
   PaymentsProfileComparator profile_comparator_;
 
   base::ObserverList<Observer> observers_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentRequestState);
 };
 
 }  // namespace payments
 
 #endif  // COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_STATE_H_