Return operation name in prefetch request callback and add internal page hookup

components/offline_pages/core/prefetch/prefetch_types.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 COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_PREFETCH_TYPES_H_
 #define COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_PREFETCH_TYPES_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 88 matching lines @@
 // Error codes used to identify the reason why a prefetch item has finished
 // processing.
 enum class PrefetchItemErrorCode {
   SUCCESS,
   EXPIRED,
 };
 
 // Callback invoked upon completion of a prefetch request.
 using PrefetchRequestFinishedCallback =
     base::Callback<void(PrefetchRequestStatus status,
+                        const std::string& operation_name,
                         const std::vector<RenderPageInfo>& pages)>;
 
 // Holds information about a new URL to be prefetched.
 struct PrefetchURL {
   PrefetchURL(const ClientId& client_id, const GURL& url)
       : client_id(client_id), url(url) {}
 
   // Client provided ID to allow the matching of URLs to the respective work
   // item in the prefetching system. It can be anything useful to identify the
   // page . It will not be used internally for de-duplication.
   ClientId client_id;
 
   // This URL will be prefetched by the service.
   GURL url;
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_PREFETCH_TYPES_H_