[Payments] Implement web payment app manifest

content/browser/payments/payment_manager.h

Index: content/browser/payments/payment_manager.h
diff --git a/content/browser/payments/payment_manager.h b/content/browser/payments/payment_manager.h
index a6e96827ab2a36bca48c73805039a7adf677bd60..da77b8128d4c02889abac663db56f7368b4f2cf7 100644
--- a/content/browser/payments/payment_manager.h
+++ b/content/browser/payments/payment_manager.h
@@ -33,7 +33,7 @@ class CONTENT_EXPORT PaymentManager
   friend class PaymentManagerTest;
 
   // payments::mojom::PaymentManager methods:
-  void Init(const std::string& scope) override;
+  void Init(const std::string& context, const std::string& scope) override;
   void DeletePaymentInstrument(
       const std::string& instrument_key,
       DeletePaymentInstrumentCallback callback) override;
@@ -52,9 +52,15 @@ class CONTENT_EXPORT PaymentManager
   // Called when an error is detected on binding_.
   void OnConnectionError();
 
+  void SetPaymentInstrumentIntermediateCallback(
+      PaymentManager::SetPaymentInstrumentCallback callback,
+      payments::mojom::PaymentHandlerStatus status);
+
   // PaymentAppContextImpl owns PaymentManager
   PaymentAppContextImpl* payment_app_context_;
 
+  bool should_set_payment_app_info_;
+  GURL context_;
   GURL scope_;
   mojo::Binding<payments::mojom::PaymentManager> binding_;
   base::WeakPtrFactory<PaymentManager> weak_ptr_factory_;