Use TaskRunner passed in to URLRequestContextBuilder only for the cache

headless/lib/browser/headless_url_request_context_getter.cc

 // Copyright 2016 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 "headless/lib/browser/headless_url_request_context_getter.h"
 
 #include <memory>
 #include <utility>
 #include <vector>
 
@@ skipping 11 matching lines @@
 
 HeadlessURLRequestContextGetter::HeadlessURLRequestContextGetter(
     scoped_refptr<base::SingleThreadTaskRunner> io_task_runner,
     content::ProtocolHandlerMap* protocol_handlers,
     ProtocolHandlerMap context_protocol_handlers,
     content::URLRequestInterceptorScopedVector request_interceptors,
     HeadlessBrowserContextOptions* options,
     net::NetLog* net_log,
     HeadlessBrowserContextImpl* headless_browser_context)
     : io_task_runner_(std::move(io_task_runner)),
-      file_task_runner_(base::CreateSingleThreadTaskRunnerWithTraits(
-          {base::MayBlock(), base::TaskPriority::BACKGROUND})),
       user_agent_(options->user_agent()),
       host_resolver_rules_(options->host_resolver_rules()),
       proxy_config_(options->proxy_config()),
       request_interceptors_(std::move(request_interceptors)),
       net_log_(net_log),
       headless_browser_context_(headless_browser_context) {
   // Must first be created on the UI thread.
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
 
   std::swap(protocol_handlers_, *protocol_handlers);
@@ skipping 19 matching lines @@
 net::URLRequestContext*
 HeadlessURLRequestContextGetter::GetURLRequestContext() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
   if (!url_request_context_) {
     net::URLRequestContextBuilder builder;
     // TODO(skyostil): Make language settings configurable.
     builder.set_user_agent(user_agent_);
     // TODO(skyostil): Make these configurable.
     builder.set_data_enabled(true);
     builder.set_file_enabled(true);
-    builder.SetFileTaskRunner(file_task_runner_);
     if (proxy_config_) {
       builder.set_proxy_service(net::ProxyService::CreateFixed(*proxy_config_));
     } else {
       builder.set_proxy_config_service(std::move(proxy_config_service_));
     }
     builder.set_network_delegate(
         base::MakeUnique<HeadlessNetworkDelegate>(headless_browser_context_));
 
     if (!host_resolver_rules_.empty()) {
       std::unique_ptr<net::HostResolver> host_resolver(
@@ skipping 21 matching lines @@
 scoped_refptr<base::SingleThreadTaskRunner>
 HeadlessURLRequestContextGetter::GetNetworkTaskRunner() const {
   return io_task_runner_;
 }
 
 net::HostResolver* HeadlessURLRequestContextGetter::host_resolver() const {
   return url_request_context_->host_resolver();
 }
 
 }  // namespace headless