[Offline pages] Introduction of MarkAttemptStartedTask with tests

components/offline_pages/background/request_coordinator.h

 // 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.
 
 #ifndef COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_
 #define COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_
 
 #include <memory>
 #include <set>
 #include <vector>
@@ skipping 265 matching lines @@
   // Callback from the request picker when no more requests are in the queue.
   // The parameter is a signal for what (if any) conditions to schedule future
   // processing for.
   void RequestNotPicked(bool non_user_requested_tasks_remaining);
 
   void HandleWatchdogTimeout();
 
   // Cancels an in progress pre-rendering, and updates state appropriately.
   void StopPrerendering(Offliner::RequestStatus stop_status);
 
+  // Marks attempt on the request and sends it to offliner in continuation.
   void SendRequestToOffliner(const SavePageRequest& request);
 
+  // Continuation of |SendRequestToOffliner| after the request is marked as
+  // started.
+  void StartOffliner(int64_t request_id,
+                     const std::string& client_namespace,
+                     std::unique_ptr<UpdateRequestsResult> update_result);
+
   // Called by the offliner when an offlining request is completed. (and by
   // tests).
   void OfflinerDoneCallback(const SavePageRequest& request,
                             Offliner::RequestStatus status);
 
   void TryNextRequest();
 
   // If there is an active request in the list, cancel that request.
   bool CancelActiveRequestIfItMatches(const std::vector<int64_t>& request_ids);
 
@@ skipping 81 matching lines @@
   base::Callback<void(bool)> immediate_schedule_callback_;
   // Allows us to pass a weak pointer to callbacks.
   base::WeakPtrFactory<RequestCoordinator> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RequestCoordinator);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_COORDINATOR_H_