Refactoring DownloadManager::DownloadURL to add proper annotation.

content/browser/background_fetch/background_fetch_test_base.cc

 // 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.
 
 #include "content/browser/background_fetch/background_fetch_test_base.h"
 
 #include <stdint.h>
 #include <memory>
 #include <utility>
 
@@ skipping 107 matching lines @@
 
   // Responds to requests to |url| with the given |response|.
   void RegisterResponse(const GURL& url,
                         std::unique_ptr<TestResponse> response) {
     DCHECK_EQ(registered_responses_.count(url), 0u);
     registered_responses_[url] = std::move(response);
   }
 
   // Called when the Background Fetch system starts a download, all information
   // for which is contained in the |params|.
-  void DownloadUrl(std::unique_ptr<DownloadUrlParameters> params) override {
+  void DownloadUrl(
+      std::unique_ptr<DownloadUrlParameters> params,
+      const net::NetworkTrafficAnnotationTag& traffic_annotation) override {
     auto iter = registered_responses_.find(params->url());
     if (iter == registered_responses_.end())
       return;
 
     TestResponse* response = iter->second.get();
 
     std::unique_ptr<FakeDownloadItem> download_item =
         base::MakeUnique<FakeDownloadItem>();
 
     download_item->SetURL(params->url());
@@ skipping 154 matching lines @@
   // Create a ServiceWorkerFetchRequest request with the same information.
   return ServiceWorkerFetchRequest(gurl, method, ServiceWorkerHeaderMap(),
                                    Referrer(), false /* is_reload */);
 }
 
 MockDownloadManager* BackgroundFetchTestBase::download_manager() {
   return download_manager_;
 }
 
 }  // namespace content