PaymentApp: Add PaymentAppProvider class.

chrome/browser/browsing_data/browsing_data_remover_unittest.cc

 // Copyright (c) 2012 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 "chrome/browser/browsing_data/browsing_data_remover.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <list>
@@ skipping 222 matching lines @@
   content::ServiceWorkerContext* GetServiceWorkerContext() override {
     return nullptr;
   }
   content::CacheStorageContext* GetCacheStorageContext() override {
     return nullptr;
   }
   content::PlatformNotificationContext* GetPlatformNotificationContext()
       override {
     return nullptr;
   }
-  content::PaymentAppContext* GetPaymentAppContext() override {
-    return nullptr;
-  }
   content::HostZoomMap* GetHostZoomMap() override { return nullptr; }
   content::HostZoomLevelContext* GetHostZoomLevelContext() override {
     return nullptr;
   }
   content::ZoomLevelDelegate* GetZoomLevelDelegate() override {
     return nullptr;
   }
 
   void ClearDataForOrigin(uint32_t remove_mask,
                           uint32_t quota_storage_remove_mask,
@@ skipping 2855 matching lines @@
   // There should be no recently visited bookmarks.
   EXPECT_THAT(ntp_snippets::GetRecentlyVisitedBookmarks(
                   bookmark_model, 2, base::Time::UnixEpoch(),
                   /*consider_visits_from_desktop=*/false),
               IsEmpty());
   EXPECT_THAT(ntp_snippets::GetRecentlyVisitedBookmarks(
                   bookmark_model, 2, base::Time::UnixEpoch(),
                   /*consider_visits_from_desktop=*/true),
               IsEmpty());
 }