headless: Introduce a browser context

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 "base/memory/ptr_util.h"
 #include "base/single_thread_task_runner.h"
@@ skipping 42 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(
+        content::BrowserThread::GetMessageLoopProxyForThread(
+            content::BrowserThread::FILE));
     if (!proxy_server_.IsEmpty()) {
       builder.set_proxy_service(
           net::ProxyService::CreateFixed(proxy_server_.ToString()));
     } else {
       builder.set_proxy_config_service(std::move(proxy_config_service_));
     }
 
     if (!host_resolver_rules_.empty()) {
       std::unique_ptr<net::HostResolver> host_resolver(
           net::HostResolver::CreateDefaultResolver(nullptr /* net_log */));
@@ skipping 27 matching lines @@
 HeadlessURLRequestContextGetter::GetNetworkTaskRunner() const {
   return content::BrowserThread::GetMessageLoopProxyForThread(
       content::BrowserThread::IO);
 }
 
 net::HostResolver* HeadlessURLRequestContextGetter::host_resolver() const {
   return url_request_context_->host_resolver();
 }
 
 }  // namespace headless