[Offline pages] Add MarkAttemptAbortedTask to Request Queue

components/offline_pages/background/request_coordinator.h

Index: components/offline_pages/background/request_coordinator.h
diff --git a/components/offline_pages/background/request_coordinator.h b/components/offline_pages/background/request_coordinator.h
index 780fd4032f763ea0a87b02404aacbdd75dcda94d..8ab2385f1801e4729ad97a497100e1820784636c 100644
--- a/components/offline_pages/background/request_coordinator.h
+++ b/components/offline_pages/background/request_coordinator.h
@@ -311,6 +311,11 @@ class RequestCoordinator : public KeyedService,
   void RemoveAttemptedRequest(const SavePageRequest& request,
                               BackgroundSavePageResult status);
 
+  // Completes aborting the request, reports an error if it fails.
+  void MarkAttemptAbortedDone(int64_t request_id,
+                              const ClientId& client_id,
+                              std::unique_ptr<UpdateRequestsResult> result);
+
   // Returns the appropriate offliner to use, getting a new one from the factory
   // if needed.
   void GetOffliner();