PaymentApp: Add interfaces for implementing InvokePaymentApp().

content/public/browser/payment_app_provider.h

 // Copyright 2016 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 CONTENT_PUBLIC_BROWSER_PAYMENT_APP_PROVIDER_H_
 #define CONTENT_PUBLIC_BROWSER_PAYMENT_APP_PROVIDER_H_
 
 #include <utility>
 #include <vector>
 
@@ skipping 17 matching lines @@
   // The ManifestWithID is a pair of the service worker registration id and
   // the payment app manifest data associated with it.
   using ManifestWithID =
       std::pair<int64_t, payments::mojom::PaymentAppManifestPtr>;
   using Manifests = std::vector<ManifestWithID>;
   using GetAllManifestsCallback = base::Callback<void(Manifests)>;
 
   // Should be accessed only on the UI thread.
   virtual void GetAllManifests(BrowserContext* browser_context,
                                const GetAllManifestsCallback& callback) = 0;
+  virtual void InvokePaymentApp(
+      BrowserContext* browser_context,
+      int64_t registration_id,
+      payments::mojom::PaymentAppRequestDataPtr data) = 0;
 
  protected:
   virtual ~PaymentAppProvider() {}
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_PAYMENT_APP_PROVIDER_H_