Remove more instances of BrowserThread::FILE.

extensions/shell/browser/shell_url_request_context_getter.cc

 // Copyright 2014 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 "extensions/shell/browser/shell_url_request_context_getter.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "content/public/browser/resource_request_info.h"
 #include "extensions/browser/info_map.h"
 #include "extensions/shell/browser/shell_network_delegate.h"
 
 namespace extensions {
 
 ShellURLRequestContextGetter::ShellURLRequestContextGetter(
     content::BrowserContext* browser_context,
     bool ignore_certificate_errors,
     const base::FilePath& base_path,
     scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
-    scoped_refptr<base::SingleThreadTaskRunner> file_task_runner,
     content::ProtocolHandlerMap* protocol_handlers,
     content::URLRequestInterceptorScopedVector request_interceptors,
     net::NetLog* net_log,
     InfoMap* extension_info_map)
     : content::ShellURLRequestContextGetter(ignore_certificate_errors,
                                             base_path,
                                             std::move(io_task_runner),
-                                            std::move(file_task_runner),
                                             protocol_handlers,
                                             std::move(request_interceptors),
                                             net_log),
       browser_context_(browser_context),
       extension_info_map_(extension_info_map) {}
 
 ShellURLRequestContextGetter::~ShellURLRequestContextGetter() {
 }
 
 std::unique_ptr<net::NetworkDelegate>
 ShellURLRequestContextGetter::CreateNetworkDelegate() {
   return base::MakeUnique<ShellNetworkDelegate>(browser_context_,
                                                 extension_info_map_);
 }
 
 }  // namespace extensions