PaymentHandler: Implement GetAllPaymentApps().

content/browser/service_worker/service_worker_database.h

 // Copyright 2014 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_SERVICE_WORKER_SERVICE_WORKER_DATABASE_H_
 #define CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_DATABASE_H_
 
 #include <stdint.h>
 
 #include <memory>
@@ skipping 206 matching lines @@
   // database.
   Status DeleteUserData(int64_t registration_id,
                         const std::vector<std::string>& user_data_names);
 
   // Reads user data for all registrations that have data with |user_data_name|
   // from the database. Returns OK if they are successfully read or not found.
   Status ReadUserDataForAllRegistrations(
       const std::string& user_data_name,
       std::vector<std::pair<int64_t, std::string>>* user_data);
 
+  // Reads user data for all registrations that have data with |user_data_name|
+  // from the database. Returns OK if they are successfully read or not found.
+  Status ReadUserDataForAllRegistrationsByKeyPrefix(
+      const std::string& user_data_name_prefix,
+      std::vector<std::pair<int64_t, std::string>>* user_data);
+
   // Resources should belong to one of following resource lists: uncommitted,
   // committed and purgeable.
   // As new resources are put into the diskcache, they go into the uncommitted
   // list. When a registration is saved that refers to those ids, they're moved
   // to the committed list. When a resource no longer has any registrations or
   // caches referring to it, it's added to the purgeable list. Periodically,
   // the purgeable list can be purged from the diskcache. At system startup, all
   // uncommitted ids are moved to the purgeable list.
 
   // Reads resource ids from the uncommitted list. Returns OK on success.
@@ skipping 171 matching lines @@
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerDatabaseTest,
                            UserData_UninitializedDatabase);
   FRIEND_TEST_ALL_PREFIXES(ServiceWorkerDatabaseTest, DestroyDatabase);
 
   DISALLOW_COPY_AND_ASSIGN(ServiceWorkerDatabase);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_SERVICE_WORKER_SERVICE_WORKER_DATABASE_H_