[Offline Pages] Breaks out new TIMED_OUT Offliner status for RequestCoordinator watchdog timeout in…

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 d130df002c45d79e744317f8c8faac2b56fba0f8..cc4420ad32a53239aa2587b5d8cf05298827d691 100644
--- a/components/offline_pages/background/request_coordinator.h
+++ b/components/offline_pages/background/request_coordinator.h
@@ -215,8 +215,12 @@ class RequestCoordinator : public KeyedService,
   // processing for.
   void RequestNotPicked(bool non_user_requested_tasks_remaining);
 
+  void HandleWatchdogTimeout();
+
+  void StopProcessingWithStatus(Offliner::RequestStatus stop_status);
+
   // Cancels an in progress pre-rendering, and updates state appropriately.
-  void StopPrerendering();
+  void StopPrerendering(Offliner::RequestStatus stop_status);
 
   void SendRequestToOffliner(const SavePageRequest& request);