[Web Payments] Add data attribution string to dialog

components/payments/content/payment_request_state.h

Index: components/payments/content/payment_request_state.h
diff --git a/components/payments/content/payment_request_state.h b/components/payments/content/payment_request_state.h
index ece3bc084541b1d6529cf14d2d1e9949adfad888..b471955eed89e742970331c3b81c56f1fe5a9d6b 100644
--- a/components/payments/content/payment_request_state.h
+++ b/components/payments/content/payment_request_state.h
@@ -24,6 +24,10 @@ class PersonalDataManager;
 class RegionDataLoader;
 }  // namespace autofill
 
+namespace content {
+class BrowserContext;
+}
+
 namespace payments {
 
 class PaymentInstrument;
@@ -95,6 +99,9 @@ class PaymentRequestState : public PaymentResponseHelper::Delegate,
   // 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);
 
@@ -156,6 +163,8 @@ class PaymentRequestState : public PaymentResponseHelper::Delegate,
   autofill::PersonalDataManager* GetPersonalDataManager();
   autofill::RegionDataLoader* GetRegionDataLoader();
 
+  content::BrowserContext* GetBrowserContext();
+
   Delegate* delegate() { return delegate_; }
 
   PaymentsProfileComparator* profile_comparator() {