Add the JobComplete callback and error/interrupt information

content/browser/background_fetch/background_fetch_context.h

Index: content/browser/background_fetch/background_fetch_context.h
diff --git a/content/browser/background_fetch/background_fetch_context.h b/content/browser/background_fetch/background_fetch_context.h
index 0ef5d6d7f3b6e4cb3f12992c66e4cdcc4da01254..029605661afe81519ebeb687578a7f0cf161ca54 100644
--- a/content/browser/background_fetch/background_fetch_context.h
+++ b/content/browser/background_fetch/background_fetch_context.h
@@ -58,6 +58,9 @@ class CONTENT_EXPORT BackgroundFetchContext
   void CreateRequest(const BackgroundFetchJobInfo& job_info,
                      std::vector<BackgroundFetchRequestInfo>& request_infos);
 
+  // Callback for the JobController when the job is complete.
+  void DidCompleteJob(const std::string& job_guid);
+
   void ShutdownOnIO();
 
   // |this| is owned by the BrowserContext via the StoragePartition.