[Offline pages] Introduction of MarkAttemptStartedTask with tests

components/offline_pages/background/request_queue.cc

 // Copyright 2016 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 "components/offline_pages/background/request_queue.h"
 
 #include "base/bind.h"
 #include "base/location.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "components/offline_pages/background/change_requests_state_task.h"
+#include "components/offline_pages/background/mark_attempt_started_task.h"
 #include "components/offline_pages/background/remove_requests_task.h"
 #include "components/offline_pages/background/request_queue_store.h"
 #include "components/offline_pages/background/save_page_request.h"
 
 namespace offline_pages {
 
 namespace {
 // Completes the get requests call.
 void GetRequestsDone(const RequestQueue::GetRequestsCallback& callback,
                      bool success,
@@ skipping 131 matching lines @@
 
 void RequestQueue::ChangeRequestsState(
     const std::vector<int64_t>& request_ids,
     const SavePageRequest::RequestState new_state,
     const RequestQueue::UpdateCallback& callback) {
   std::unique_ptr<Task> task(new ChangeRequestsStateTask(
       store_.get(), request_ids, new_state, callback));
   task_queue_.AddTask(std::move(task));
 }
 
+void RequestQueue::MarkAttemptStarted(int64_t request_id,
+                                      const UpdateCallback& callback) {
+  std::unique_ptr<Task> task(
+      new MarkAttemptStartedTask(store_.get(), request_id, callback));
+  task_queue_.AddTask(std::move(task));
+}
+
 void RequestQueue::PurgeRequests(const PurgeRequestsCallback& callback) {}
 
 }  // namespace offline_pages