Refactoring DownloadManager::DownloadURL to add proper annotation.

content/browser/download/download_manager_impl.h

 // Copyright (c) 2012 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_DOWNLOAD_DOWNLOAD_MANAGER_IMPL_H_
 #define CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_IMPL_H_
 
 #include <stdint.h>
 
 #include <memory>
 #include <set>
 #include <string>
 #include <unordered_map>
 #include <vector>
 
 #include "base/callback_forward.h"
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "base/sequenced_task_runner_helpers.h"
 #include "base/synchronization/lock.h"
 #include "content/browser/download/download_item_impl_delegate.h"
 #include "content/browser/download/url_downloader.h"
 #include "content/common/content_export.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/download_manager.h"
 #include "content/public/browser/download_manager_delegate.h"
 #include "content/public/browser/download_url_parameters.h"
+#include "net/traffic_annotation/network_traffic_annotation.h"
 
 namespace net {
 class NetLog;
 }
 
 namespace content {
 class DownloadFileFactory;
 class DownloadItemFactory;
 class DownloadItemImpl;
 class DownloadRequestHandleInterface;
@@ skipping 32 matching lines @@
   void GetAllDownloads(DownloadVector* result) override;
   void StartDownload(
       std::unique_ptr<DownloadCreateInfo> info,
       std::unique_ptr<ByteStreamReader> stream,
       const DownloadUrlParameters::OnStartedCallback& on_started) override;
 
   int RemoveDownloadsByURLAndTime(
       const base::Callback<bool(const GURL&)>& url_filter,
       base::Time remove_begin,
       base::Time remove_end) override;
-  void DownloadUrl(std::unique_ptr<DownloadUrlParameters> params) override;
+  void DownloadUrl(
+      std::unique_ptr<DownloadUrlParameters> params,
+      const net::NetworkTrafficAnnotationTag& traffic_annotation) override;
   void AddObserver(Observer* observer) override;
   void RemoveObserver(Observer* observer) override;
   content::DownloadItem* CreateDownloadItem(
       const std::string& guid,
       uint32_t id,
       const base::FilePath& current_path,
       const base::FilePath& target_path,
       const std::vector<GURL>& url_chain,
       const GURL& referrer_url,
       const GURL& site_url,
@@ skipping 154 matching lines @@
       url_downloaders_;
 
   base::WeakPtrFactory<DownloadManagerImpl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(DownloadManagerImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_DOWNLOAD_DOWNLOAD_MANAGER_IMPL_H_