PaymentApp: Add interfaces for implementing InvokePaymentApp().

content/browser/payments/payment_app_provider_impl.cc

 // 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.
 
 #include "content/browser/payments/payment_app_provider_impl.h"
 
 #include "content/browser/payments/payment_app_context_impl.h"
 #include "content/browser/storage_partition_impl.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 43 matching lines @@
 
   BrowserThread::PostTask(
       BrowserThread::IO, FROM_HERE,
       base::Bind(&GetAllManifestsOnIO, payment_app_context, callback));
 }
 
 PaymentAppProviderImpl::PaymentAppProviderImpl() {}
 
 PaymentAppProviderImpl::~PaymentAppProviderImpl() {}
 
+void PaymentAppProviderImpl::InvokePaymentApp(

[please use gerrit instead, 2017/01/09 14:42:12]

Needs to be under GetAllManifests() to keep the order in this file the same as
in the header file.

[zino, 2017/01/09 18:06:14]

When I wrote this code at first time, I kept the order. But it seems to be
broken at rebase time.
Sorry for my repeated mistake.

Done.

+    BrowserContext* browser_context,
+    int64_t registration_id,
+    payments::mojom::PaymentAppRequestDataPtr data) {
+  NOTIMPLEMENTED();
+}
+
 }  // namespace content