PaymentApp: Add interfaces for implementing InvokePaymentApp().

content/browser/payments/payment_app_provider_impl.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 CONTENT_BROWSER_PAYMENTS_PAYMENT_APP_PROVIDER_IMPL_H_
 #define CONTENT_BROWSER_PAYMENTS_PAYMENT_APP_PROVIDER_IMPL_H_
 
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/singleton.h"
 #include "components/payments/payment_app.mojom.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/payment_app_provider.h"
 
 namespace content {
 
 class BrowserContext;
 
 class CONTENT_EXPORT PaymentAppProviderImpl : public PaymentAppProvider {
  public:
   static PaymentAppProviderImpl* GetInstance();
 
   // PaymentAppProvider implementation:
   // Should be accessed only on the UI thread.
   void GetAllManifests(BrowserContext* browser_context,
                        const GetAllManifestsCallback& callback) override;
+  void InvokePaymentApp(
+      BrowserContext* browser_context,
+      int64_t registration_id,
+      payments::mojom::PaymentAppRequestDataPtr data) override;
 
  private:
   PaymentAppProviderImpl();
   ~PaymentAppProviderImpl() override;
 
   friend struct base::DefaultSingletonTraits<PaymentAppProviderImpl>;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentAppProviderImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_PAYMENTS_PAYMENT_APP_PROVIDER_IMPL_H_