[Payments] Implement payment instrument icons

content/browser/payments/payment_app_database.h

Index: content/browser/payments/payment_app_database.h
diff --git a/content/browser/payments/payment_app_database.h b/content/browser/payments/payment_app_database.h
index 001685034d7bb140a3a1953d63260395ea64e689..93c97f36efb1dde2de77bb302295fd6c21b99dcd 100644
--- a/content/browser/payments/payment_app_database.h
+++ b/content/browser/payments/payment_app_database.h
@@ -12,6 +12,7 @@
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "components/payments/mojom/payment_app.mojom.h"
+#include "content/browser/payments/payment_instrument_icon_fetcher.h"
 #include "content/browser/service_worker/service_worker_context_wrapper.h"
 #include "content/browser/service_worker/service_worker_registration.h"
 #include "content/common/content_export.h"
@@ -128,6 +129,14 @@ class CONTENT_EXPORT PaymentAppDatabase {
   void DidWritePaymentInstrument(WritePaymentInstrumentCallback callback,
                                  ServiceWorkerStatusCode status);
 
+  // PaymentInstrumentIconFetcherCallback.
+  void DidFetchedPaymentInstrumentIcon(
+      const std::string& instrument_key,
+      payments::mojom::PaymentInstrumentPtr instrument,
+      WritePaymentInstrumentCallback callback,
+      scoped_refptr<ServiceWorkerRegistration> registration,
+      const std::string& icon);
+
   // ClearPaymentInstruments callbacks
   void DidFindRegistrationToClearPaymentInstruments(
       const GURL& scope,
@@ -142,6 +151,7 @@ class CONTENT_EXPORT PaymentAppDatabase {
   void DidClearPaymentInstruments(ClearPaymentInstrumentsCallback callback,
                                   ServiceWorkerStatusCode status);
 
+  std::unique_ptr<PaymentInstrumentIconFetcher> instrument_icon_fetcher_;
   scoped_refptr<ServiceWorkerContextWrapper> service_worker_context_;
   base::WeakPtrFactory<PaymentAppDatabase> weak_ptr_factory_;