PaymentApp: Introduce PaymentAppDatabase class.

content/browser/storage_partition_impl.cc

Index: content/browser/storage_partition_impl.cc
diff --git a/content/browser/storage_partition_impl.cc b/content/browser/storage_partition_impl.cc
index 1562ad45f673f6f05b3aea9397a90073caebac62..ba754b24d6269fd82bc2c6b47e00f50f4a3be11b 100644
--- a/content/browser/storage_partition_impl.cc
+++ b/content/browser/storage_partition_impl.cc
@@ -488,8 +488,8 @@ std::unique_ptr<StoragePartitionImpl> StoragePartitionImpl::Create(
   partition->background_sync_context_ = new BackgroundSyncContext();
   partition->background_sync_context_->Init(partition->service_worker_context_);
 
-  partition->payment_app_context_ = new PaymentAppContextImpl(
-      partition->service_worker_context_);
+  partition->payment_app_context_ = new PaymentAppContextImpl();
+  partition->payment_app_context_->Init(partition->service_worker_context_);
 
   partition->broadcast_channel_provider_ = new BroadcastChannelProvider();