Fire the `backgroundfetchfail` event for failed fetches

content/browser/background_fetch/background_fetch_context.h

 // Copyright 2017 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_BACKGROUND_FETCH_BACKGROUND_FETCH_CONTEXT_H_
 #define CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_CONTEXT_H_
 
 #include <map>
 #include <string>
 #include <vector>
@@ skipping 95 matching lines @@
       std::vector<scoped_refptr<BackgroundFetchRequestInfo>> initial_requests);
 
   // Called when the given |controller| has finished processing its job.
   void DidCompleteJob(BackgroundFetchJobController* controller);
 
   // Called when the sequence of settled fetches for |registration_id| have been
   // retrieved from storage, and the Service Worker event can be invoked.
   void DidGetSettledFetches(
       const BackgroundFetchRegistrationId& registration_id,
       blink::mojom::BackgroundFetchError error,
+      bool background_fetch_succeeded,
       std::vector<BackgroundFetchSettledFetch> settled_fetches,
       std::vector<std::unique_ptr<BlobHandle>> blob_handles);
 
   // Called when all processing for the |registration_id| has been finished and
   // the job, including its associated data, is ready to be deleted.
   void DeleteRegistration(
       const BackgroundFetchRegistrationId& registration_id,
       const std::vector<std::unique_ptr<BlobHandle>>& blob_handles);
 
   // |this| is owned, indirectly, by the BrowserContext.
   BrowserContext* browser_context_;
 
   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
 
   std::unique_ptr<BackgroundFetchDataManager> data_manager_;
   std::unique_ptr<BackgroundFetchEventDispatcher> event_dispatcher_;
 
   // Map of the Background Fetch fetches that are currently in-progress.
   std::map<BackgroundFetchRegistrationId,
            std::unique_ptr<BackgroundFetchJobController>>
       active_fetches_;
 
   DISALLOW_COPY_AND_ASSIGN(BackgroundFetchContext);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_BACKGROUND_FETCH_BACKGROUND_FETCH_CONTEXT_H_