Refactoring DownloadManager::DownloadURL to add proper annotation.

components/download/internal/test/test_download_driver.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 "components/download/internal/test/test_download_driver.h"
 
 #include "base/files/file_path.h"
 #include "components/download/public/download_params.h"
 #include "net/http/http_response_headers.h"
 
@@ skipping 35 matching lines @@
 
 void TestDownloadDriver::Initialize(DownloadDriver::Client* client) {
   DCHECK(!client_);
   client_ = client;
 }
 
 bool TestDownloadDriver::IsReady() const {
   return is_ready_;
 }
 
-void TestDownloadDriver::Start(const DownloadParams& params) {
+void TestDownloadDriver::Start(
+    const DownloadParams& params,
+    const net::NetworkTrafficAnnotationTag& traffic_annotation) {
   DriverEntry entry;
   entry.guid = params.guid;
   entry.state = DriverEntry::State::IN_PROGRESS;
   entry.paused = false;
   entry.bytes_downloaded = 0;
   entry.expected_total_size = 0;
   entry.response_headers =
       base::MakeRefCounted<net::HttpResponseHeaders>("HTTP/1.1 200");
   entries_[params.guid] = entry;
 
   if (client_)
     client_->OnDownloadCreated(entry);
 }
 
 void TestDownloadDriver::Cancel(const std::string& guid) {}
 
 void TestDownloadDriver::Pause(const std::string& guid) {}
 
 void TestDownloadDriver::Resume(const std::string& guid) {}
 
 base::Optional<DriverEntry> TestDownloadDriver::Find(const std::string& guid) {
   auto it = entries_.find(guid);
   if (it == entries_.end())
     return base::nullopt;
   return it->second;
 }
 
 }  // namespace downloads